{ "data": { "a": { "slug": "leonardo-ai", "name": "Leonardo.Ai API", "vendor": "Leonardo.Ai (Canva)", "vendorUrl": "https://leonardo.ai", "kind": "model", "category": "image-generation", "summary": "Leonardo's own Phoenix and Lucid image models alongside resold third-party ones (FLUX, GPT Image, Ideogram 3.0, Nano Banana, Seedream) through one v2 generations endpoint.", "url": "https://www.anchorterminal.com/tools/leonardo-ai", "markdownUrl": "https://www.anchorterminal.com/tools/leonardo-ai.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/leonardo-ai.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/leonardo-ai.json", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://cloud.leonardo.ai/api/rest/v2", "packages": [ { "registry": "npm", "name": "@leonardo-ai/sdk" }, { "registry": "pypi", "name": "leonardo-ai-sdk" } ], "auth": "api-key", "authNotes": "Bearer API key created on the API Access page of the web app. The hosted MCP server at https://mcp.leonardo.ai/v1/mcp takes the same key in an API-Key header.", "pricing": "usage", "pricingNotes": "Pay as you go from a prepaid dollar balance that doesn't expire, with optional auto top-up. No monthly fee. API billing is separate from web app subscriptions. Per-image prices aren't published as a table. Cost depends on model, resolution and output count, shown in the in-app pricing calculator and returned in a cost object on each generation. Custom plans on request (https://docs.leonardo.ai/docs/pricing-and-plans-faq).", "priceSummary": "Pay per use", "where": "hosted", "x402": { "level": "no", "evidence": "No x402 in the API docs (checked 2026-09-30).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": 20039, "pypiWeekly": 82, "asOf": "2026-09-30" }, "docsUrl": "https://docs.leonardo.ai/docs/getting-started", "llmsTxt": "https://docs.leonardo.ai/llms.txt", "capabilities": [ "image.generate", "image.edit", "image.upscale", "image.reference" ], "tags": [ "hosted", "closed-source", "mcp", "llms-txt", "python", "typescript", "async-jobs", "webhooks", "commercial-licence" ], "lastRelease": "2026-04-21", "graded": true, "anchor": { "graded": true, "score": 37.5, "grade": "F", "agentReady": false, "rank": 926, "ranked": true, "rankOf": 950, "categoryRank": 11, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 54, "maintenance": 48, "payments": 0, "reliability": 30, "schema": 45, "security": 40, "transparency": 48 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "Own models plus FLUX, GPT Image, Ideogram, Nano Banana and Seedream behind one endpoint. No per-image price list outside the logged-in calculator.", "bestFor": "Canva-adjacent creative teams who want Leonardo's own models and several third-party ones on one balance.", "strengths": [ "Own models plus FLUX, GPT Image, Ideogram, Nano Banana and Seedream behind one endpoint", "Pay as you go with a balance that doesn't expire and no monthly fee", "Every generation returns a cost object", "Official TypeScript and Python SDKs, published through npm trusted publishing", "Webhook callbacks as well as polling" ], "weaknesses": [ "No per-image price list outside the logged-in calculator", "No status page and no security.txt", "Deprecation notice of 8 to 28 days with no stated policy", "No documented status code or backoff advice for limit errors", "TypeScript SDK last released on 21 April 2026" ], "agentNotes": [ "Use `POST /api/rest/v2/generations` with a `model` name such as `lucid-origin`", "Read the `cost` object in each response to track spend, prices aren't published", "Send `quality`, not `mode`. `mode` was retired on 2026-05-04", "Set a webhook callback URL on the key instead of polling long jobs", "Check the deprecations page before relying on a third-party model, removals follow the provider" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 2, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "F", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 37.5 } ], "editorialScores": { "ergonomics": 54, "maintenance": 48, "payments": 0, "reliability": 30, "schema": 45, "security": 40, "transparency": 25 }, "provenanceScore": 70 }, "connect": { "http": "curl -X POST https://cloud.leonardo.ai/api/rest/v2/generations \\\n -H \"authorization: Bearer $LEONARDO_API_KEY\" -H \"content-type: application/json\" \\\n -d '{\"model\":\"lucid-origin\",\"parameters\":{\"prompt\":\"a fox in a snowy forest\",\"width\":1024,\"height\":1024,\"quantity\":1},\"public\":false}'", "config": { "mcpServers": { "leonardo-ai": { "headers": { "API-Key": "${LEONARDO_API_KEY}" }, "url": "https://mcp.leonardo.ai/v1/mcp" } } } }, "letme": { "capability": "https://letme.dev/image.generate", "tool": "https://letme.dev/leonardo-ai" }, "area": "content", "provenance": { "legalEntity": "Leonardo Interactive Pty Ltd", "domain": "leonardo.ai", "domainRegistered": "2019-01-08", "domainNote": "leonardo.ai was registered in 2019, before the company launched its product in 2022.", "endpointOnVendorDomain": true, "terms": "https://leonardo.ai/terms-of-service", "privacy": "https://leonardo.ai/privacy-policy", "statusPage": "", "changelog": "https://docs.leonardo.ai/docs/deprecations-changes", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "Legal entity is Leonardo Interactive Pty Ltd T/A Leonardo.Ai (ACN 662 209 485), a Canva subsidiary since 2024", "leonardo.ai returns 403 to curl and WebFetch, so the terms and privacy pages were read via search results", "status.leonardo.ai failed TLS and no other status page was found" ], "score": 70 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/leonardo-ai.json", "live": { "slug": "leonardo-ai", "probe": { "target": "https://cloud.leonardo.ai/api/rest/v2", "method": "get", "lastAt": "2026-10-10T03:53:32.2830616Z", "lastOk": true, "lastStatus": 401, "lastMs": 151, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 173, "p95ms24h": 360, "samples24h": 249, "samples30d": 2476, "days": [ { "date": "2026-09-30", "probes": 35, "ok": 35 }, { "date": "2026-10-01", "probes": 276, "ok": 276 }, { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 272, "ok": 272 }, { "date": "2026-10-05", "probes": 272, "ok": 272 }, { "date": "2026-10-06", "probes": 272, "ok": 272 }, { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 40, "ok": 40 } ] }, "versions": [ { "registry": "npm", "name": "@leonardo-ai/sdk", "version": "4.21.3", "seenAt": "2026-10-09T17:02:00.343482034Z" }, { "registry": "pypi", "name": "leonardo-ai-sdk", "version": "7.0.0", "released": "2026-02-05", "seenAt": "2026-10-09T17:02:01.399991953Z" } ], "npmWeekly": 18778, "pypiWeekly": 44, "securityTxt": { "url": "https://leonardo.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-09T15:39:18.024410184Z" }, "llmsTxt": { "url": "https://docs.leonardo.ai/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-09T14:02:14.188497248Z" }, "domain": { "domain": "leonardo.ai", "registered": "2019-01-08", "source": "https://rdap.identitydigital.services/rdap/domain/leonardo.ai", "checkedAt": "2026-10-04T13:07:29.136922598Z" }, "pages": [ { "url": "https://docs.leonardo.ai/docs/deprecations-changes", "kind": "deprecations", "status": 200, "checkedAt": "2026-10-09T18:37:35.374433798Z", "changedAt": "2026-10-08T18:18:55.447576253Z", "fingerprint": "541567b91656" }, { "url": "https://docs.leonardo.ai/docs/pricing-and-plans-faq", "kind": "pricing", "status": 200, "checkedAt": "2026-10-09T18:37:38.312388903Z", "changedAt": "2026-10-08T18:18:58.374377021Z", "fingerprint": "4a918fa1293b" }, { "url": "https://leonardo.ai/privacy-policy", "kind": "privacy", "status": 403, "checkedAt": "2026-10-09T18:41:17.548462485Z", "changedAt": "0001-01-01T00:00:00Z" }, { "url": "https://leonardo.ai/terms-of-service", "kind": "terms", "status": 403, "checkedAt": "2026-10-09T18:41:19.558647319Z", "changedAt": "0001-01-01T00:00:00Z" } ], "updatedAt": "2026-10-10T03:53:32.2830616Z" } }, "answer": "Seedream on BytePlus ModelArk scores 53.8 (D) on agent readiness against Leonardo.Ai API's 37.5 (F), and leads in every scored category.", "b": { "slug": "seedream-on-byteplus-modelark", "name": "Seedream on BytePlus ModelArk", "vendor": "BytePlus Pte. Ltd. (ByteDance)", "vendorUrl": "https://www.byteplus.com", "kind": "model", "category": "image-generation", "summary": "BytePlus ModelArk's hosted API for ByteDance's Seedream image models. One endpoint handles text-to-image, reference-image editing, batches of related images and layer decomposition, billed per generated image.", "url": "https://www.anchorterminal.com/tools/seedream-on-byteplus-modelark", "markdownUrl": "https://www.anchorterminal.com/tools/seedream-on-byteplus-modelark.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/seedream-on-byteplus-modelark.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/seedream-on-byteplus-modelark.json", "repo": "https://github.com/volcengine/ark-runtime-go", "license": "Proprietary service under the BytePlus Customer Agreement and Service Specific Terms. The Go and Python SDK repositories are Apache-2.0", "transports": [ "http" ], "remoteUrl": "https://ark.ap-southeast.bytepluses.com/api/v3", "packages": [ { "registry": "pypi", "name": "arkruntime" }, { "registry": "pypi", "name": "byteplus-python-sdk-v2" }, { "registry": "go", "name": "github.com/volcengine/ark-runtime-go" } ], "auth": "api-key", "authNotes": "The image endpoint takes a ModelArk API key as a Bearer token and, per its reference, no other credential. Keys are created in the console after a browser sign-up, belong to one resource project and one region, and can be limited to named model IDs or custom inference endpoints and to an IP allowlist. A key can be disabled, re-enabled or deleted, and a primary account holds up to 50. Each model must be activated in the console before use.", "pricing": "usage", "pricingNotes": "Pay as you go per successfully generated image, in US dollars, published without a login. Seedream 5.0 flash $0.018, 4.0 $0.03, 5.0 lite $0.035, 4.5 $0.04, 5.0 pro $0.045 up to 2.61 million pixels and $0.09 above. Input images are free except on 5.0 pro, which charges $0.003 from the second. No free image quota is listed for Seedream, and an account in arrears for two hours is suspended (https://docs.byteplus.com/en/docs/modelark/model-pricing).", "priceSummary": "Pay per use", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the API reference, the pricing page or the error codes (checked 2026-10-09).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-09" }, "docsUrl": "https://docs.byteplus.com/en/docs/modelark/image-generation-api", "capabilities": [ "image.generate", "image.edit", "image.reference" ], "tags": [ "hosted", "closed-source", "api-key", "python", "go", "java", "openai-compatible", "watermark", "streaming", "regional-endpoints" ], "lastRelease": "2026-09-17", "graded": true, "anchor": { "graded": true, "score": 53.8, "grade": "D", "agentReady": false, "rank": 700, "ranked": true, "rankOf": 950, "categoryRank": 5, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 72, "maintenance": 73, "payments": 20, "reliability": 43, "schema": 62, "security": 70, "transparency": 60 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-09" }, "negative": -3, "negativeNotes": [ "The model list (updated 28 September 2026) says `seedream-5-0-lite` is supported in eu-west-1, while the deprecation page says the model was deactivated in that region on 10 September 2026 and the region page lists only `seed-2-0-lite` for the EU. The batch that carries the notice is dated 8 September 2026, two days earlier, against the page's own 30-day minimum. We made no call to confirm which page is right. 3 points (https://docs.byteplus.com/en/docs/modelark/model-deprecation-notice)." ], "verdict": "Per-image prices from $0.018 are public, and API keys can be limited to named models and an IP allowlist. No status page, SLA or OpenAPI file was found, onboarding needs a browser sign-up, and BytePlus says its model services are not available in the United States.", "bestFor": "Agents that need ByteDance's Seedream models first-hand, multi-reference edits, 4K output or layered PNG output at a published per-image price, for users outside the United States.", "strengths": [ "Per-image prices are public for five Seedream models, from $0.018 (5.0 flash) to $0.09 (5.0 pro above 1.5K), and failed or moderated images are not billed", "API keys are scoped to a project and can be limited to named model IDs or endpoints and to an IP allowlist", "Up to 14 reference images on Seedream 5.0 lite, 4.5 and 4.0, and up to 4K output (4096x4096) on those models", "The error reference lists 15 distinct 429 codes, and a burst-traffic guide gives backoff code with jitter", "The service terms say customer data is not used for training unless the customer opts in", "A written deprecation process promises at least 30 calendar days' notice, with dated batches and named replacements" ], "weaknesses": [ "No status page, incident history or ModelArk SLA was found in the pages read", "No OpenAPI file, llms.txt or Markdown docs for agents were found. The docs site is drawn by script", "The model list says `seedream-5-0-lite` runs in eu-west-1, while the deprecation page says it was deactivated there on 10 September 2026", "The Service Specific Terms say BytePlus Model Services are not available in the United States", "No idempotency key was found, so a retried request that succeeded is a second paid generation", "Image URLs expire 24 hours after generation, and a watermark is added unless `watermark` is set to false" ], "agentNotes": [ "POST to `https://ark.ap-southeast.bytepluses.com/api/v3/images/generations` with `Authorization: Bearer $ARK_API_KEY`. Keys and model activation are per region", "Set `watermark` to false if the image must not carry the AI-generated mark. The default is true", "Download `data[].url` within 24 hours, or ask for `response_format` `b64_json`", "Check each `data[].error` in a sequential batch. One moderated image does not fail the others, and only `usage.generated_images` is billed", "Stay under 500 images a minute per model and back off with jitter on 429. Layer decomposition reserves 17 against that limit per request" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "D", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 53.8 } ], "editorialScores": { "ergonomics": 72, "maintenance": 73, "payments": 20, "reliability": 43, "schema": 62, "security": 70, "transparency": 61 }, "provenanceScore": 59 }, "connect": { "install": "python -m pip install --upgrade arkruntime", "http": "curl https://ark.ap-southeast.bytepluses.com/api/v3/images/generations \\\n -H \"Content-Type: application/json\" \\\n -H \"Authorization: Bearer $ARK_API_KEY\" \\\n -d '{\"model\":\"seedream-5-0-lite-260128\",\"prompt\":\"A lighthouse at dusk\",\"size\":\"2K\",\"output_format\":\"png\",\"watermark\":false}'" }, "letme": { "capability": "https://letme.dev/image.generate", "tool": "https://letme.dev/seedream-on-byteplus-modelark" }, "sameCompany": [ "seedance-on-byteplus-modelark" ], "area": "content", "unitPrices": [ { "item": "Seedream 5.0 flash", "unit": "image", "usd": 0.018 }, { "item": "Seedream 4.0", "unit": "image", "usd": 0.03 }, { "item": "Seedream 5.0 lite", "unit": "image", "usd": 0.035 }, { "item": "Seedream 4.5", "unit": "image", "usd": 0.04 }, { "item": "Seedream 5.0 pro", "unit": "image", "usd": 0.045, "note": "up to 2.61 million pixels (1.5K or lower)" }, { "item": "Seedream 5.0 pro above 1.5K", "unit": "image", "usd": 0.09, "note": "more than 2.61 million pixels" } ], "provenance": { "legalEntity": "BytePlus Pte. Ltd.", "domain": "byteplus.com", "domainRegistered": "2002-09-07", "endpointOnVendorDomain": false, "terms": "https://docs.byteplus.com/en/docs/legal/docs-customer-agreement", "privacy": "https://docs.byteplus.com/en/docs/legal/docs-privacy-policy", "statusPage": "", "changelog": "https://docs.byteplus.com/en/docs/modelark/model-release-announcement", "securityTxt": "none", "checked": "2026-10-09", "notes": [ "The Customer Agreement (effective 30 September 2026) is made with BytePlus Pte. Ltd. or another BytePlus affiliate named as the contracting entity. The Service Specific Terms, which hold the ModelArk and Model Services sections, rank above it.", "The API answers at ark.ap-southeast.bytepluses.com and ark.eu-west.bytepluses.com, a different domain from byteplus.com. BytePlus's own docs name both hosts.", "The Privacy Policy names Byteplus Pte. Ltd. in Singapore as controller and says it does not cover personal data processed on behalf of corporate customers. That processing falls under the Data Processing Addendum, which we did not read.", "https://www.byteplus.com/.well-known/security.txt returns the site's HTML shell, not a security.txt file. The SDK repositories carry a SECURITY.md that sends reports to ByteDance's security centre.", "No status page was found in the docs or on the pages of www.byteplus.com that we could read.", "RDAP for byteplus.com gives a registration date of 2002-09-07 and Gandi SAS as registrar." ], "score": 59 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/seedream-on-byteplus-modelark.json", "live": { "slug": "seedream-on-byteplus-modelark", "probe": { "target": "https://ark.ap-southeast.bytepluses.com/api/v3", "method": "get", "lastAt": "2026-10-10T03:53:42.879224265Z", "lastOk": true, "lastStatus": 401, "lastMs": 470, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 507, "p95ms24h": 595, "samples24h": 125, "samples30d": 125, "days": [ { "date": "2026-10-09", "probes": 85, "ok": 85 }, { "date": "2026-10-10", "probes": 40, "ok": 40 } ] }, "versions": [ { "registry": "pypi", "name": "arkruntime", "version": "0.8.0", "released": "2026-09-17", "seenAt": "2026-10-09T17:19:00.477962822Z" }, { "registry": "pypi", "name": "byteplus-python-sdk-v2", "version": "3.0.61", "released": "2026-09-17", "seenAt": "2026-10-09T17:19:00.589058252Z" } ], "githubStars": 1, "pypiWeekly": 1265, "pages": [ { "url": "https://docs.byteplus.com/en/docs/modelark/model-release-announcement", "kind": "changelog", "status": 200, "checkedAt": "2026-10-09T18:36:54.525658153Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "2c972ac5021a" }, { "url": "https://docs.byteplus.com/en/docs/modelark/model-pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-10-09T18:36:52.663758009Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "faaf238183a5" } ], "updatedAt": "2026-10-10T03:53:42.879224265Z" } }, "facts": [ { "a": "Model API", "b": "Model API", "name": "Kind" }, { "a": "Leonardo.Ai (Canva)", "b": "BytePlus Pte. Ltd. (ByteDance)", "name": "Vendor" }, { "a": "https://cloud.leonardo.ai/api/rest/v2", "b": "https://ark.ap-southeast.bytepluses.com/api/v3", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP", "b": "HTTP", "name": "Transports" }, { "a": "API key", "b": "API key", "name": "Auth" }, { "a": "Pay per use", "b": "Pay per use", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "none", "b": "Proprietary service under the BytePlus Customer Agreement and Service Specific Terms. The Go and Python SDK repositories are Apache-2.0", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "no", "name": "llms.txt" }, { "a": "2026-04-21", "b": "2026-09-17", "name": "Last release" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Terms last updated" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Privacy policy last updated" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Customer content may train models" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Terms restrict automated access" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Terms restrict benchmarking" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Terms or service can change without notice" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Arbitration or class-action waiver" }, { "a": "20k npm/wk, 82 PyPI/wk", "b": "none", "name": "Popularity" }, { "a": "2/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Seedream on BytePlus ModelArk scores 53.8 (D) on agent readiness against Leonardo.Ai API's 37.5 (F), and leads in every scored category.", "question": "Which is better for AI agents, Leonardo.Ai API or Seedream on BytePlus ModelArk?" }, { "answer": "Both need an API key.", "question": "Do Leonardo.Ai API and Seedream on BytePlus ModelArk need an API key?" }, { "answer": "Yes. Leonardo.Ai API has a hosted endpoint at https://cloud.leonardo.ai/api/rest/v2 and Seedream on BytePlus ModelArk at https://ark.ap-southeast.bytepluses.com/api/v3.", "question": "Can an agent call Leonardo.Ai API and Seedream on BytePlus ModelArk without installing anything?" } ], "goodFor": [ { "aheadOn": null, "also": [ "No incidents deducted, where Seedream on BytePlus ModelArk loses 3 points for them" ], "goodFor": "Canva-adjacent creative teams who want Leonardo's own models and several third-party ones on one balance.", "slug": "leonardo-ai", "watchFor": "No per-image price list outside the logged-in calculator" }, { "aheadOn": [ "Reliability, 43 against 30", "Schema \u0026 documentation, 62 against 45", "Agent ergonomics, 72 against 54", "Security \u0026 auth, 70 against 40", "Payments \u0026 pricing, 20 against 0", "Maintenance \u0026 community, 73 against 48", "Transparency \u0026 trust, 60 against 48" ], "also": null, "goodFor": "Agents that need ByteDance's Seedream models first-hand, multi-reference edits, 4K output or layered PNG output at a published per-image price, for users outside the United States.", "slug": "seedream-on-byteplus-modelark", "watchFor": "No status page, incident history or ModelArk SLA was found in the pages read" } ], "job": { "capability": "image.generate", "name": "Image generation" }, "others": [ { "json": "https://www.anchorterminal.com/compare/adobe-firefly-vs-leonardo-ai.json", "title": "Adobe Firefly API vs Leonardo.Ai API", "url": "https://www.anchorterminal.com/compare/adobe-firefly-vs-leonardo-ai" }, { "json": "https://www.anchorterminal.com/compare/adobe-firefly-vs-seedream-on-byteplus-modelark.json", "title": "Adobe Firefly API vs Seedream on BytePlus ModelArk", "url": "https://www.anchorterminal.com/compare/adobe-firefly-vs-seedream-on-byteplus-modelark" }, { "json": "https://www.anchorterminal.com/compare/black-forest-labs-vs-leonardo-ai.json", "title": "Black Forest Labs FLUX API vs Leonardo.Ai API", "url": "https://www.anchorterminal.com/compare/black-forest-labs-vs-leonardo-ai" }, { "json": "https://www.anchorterminal.com/compare/black-forest-labs-vs-seedream-on-byteplus-modelark.json", "title": "Black Forest Labs FLUX API vs Seedream on BytePlus ModelArk", "url": "https://www.anchorterminal.com/compare/black-forest-labs-vs-seedream-on-byteplus-modelark" }, { "json": "https://www.anchorterminal.com/compare/bria-vs-leonardo-ai.json", "title": "Bria API vs Leonardo.Ai API", "url": "https://www.anchorterminal.com/compare/bria-vs-leonardo-ai" }, { "json": "https://www.anchorterminal.com/compare/bria-vs-seedream-on-byteplus-modelark.json", "title": "Bria API vs Seedream on BytePlus ModelArk", "url": "https://www.anchorterminal.com/compare/bria-vs-seedream-on-byteplus-modelark" }, { "json": "https://www.anchorterminal.com/compare/fal-image-vs-leonardo-ai.json", "title": "fal image models vs Leonardo.Ai API", "url": "https://www.anchorterminal.com/compare/fal-image-vs-leonardo-ai" }, { "json": "https://www.anchorterminal.com/compare/fal-image-vs-seedream-on-byteplus-modelark.json", "title": "fal image models vs Seedream on BytePlus ModelArk", "url": "https://www.anchorterminal.com/compare/fal-image-vs-seedream-on-byteplus-modelark" }, { "json": "https://www.anchorterminal.com/compare/google-imagen-vs-leonardo-ai.json", "title": "Google Imagen vs Leonardo.Ai API", "url": "https://www.anchorterminal.com/compare/google-imagen-vs-leonardo-ai" }, { "json": "https://www.anchorterminal.com/compare/google-imagen-vs-seedream-on-byteplus-modelark.json", "title": "Google Imagen vs Seedream on BytePlus ModelArk", "url": "https://www.anchorterminal.com/compare/google-imagen-vs-seedream-on-byteplus-modelark" }, { "json": "https://www.anchorterminal.com/compare/ideogram-vs-leonardo-ai.json", "title": "Ideogram API vs Leonardo.Ai API", "url": "https://www.anchorterminal.com/compare/ideogram-vs-leonardo-ai" }, { "json": "https://www.anchorterminal.com/compare/ideogram-vs-seedream-on-byteplus-modelark.json", "title": "Ideogram API vs Seedream on BytePlus ModelArk", "url": "https://www.anchorterminal.com/compare/ideogram-vs-seedream-on-byteplus-modelark" }, { "json": "https://www.anchorterminal.com/compare/leonardo-ai-vs-openai-image-api.json", "title": "Leonardo.Ai API vs OpenAI Image API", "url": "https://www.anchorterminal.com/compare/leonardo-ai-vs-openai-image-api" }, { "json": "https://www.anchorterminal.com/compare/leonardo-ai-vs-recraft.json", "title": "Leonardo.Ai API vs Recraft API", "url": "https://www.anchorterminal.com/compare/leonardo-ai-vs-recraft" }, { "json": "https://www.anchorterminal.com/compare/leonardo-ai-vs-replicate-image.json", "title": "Leonardo.Ai API vs Replicate image models", "url": "https://www.anchorterminal.com/compare/leonardo-ai-vs-replicate-image" }, { "json": "https://www.anchorterminal.com/compare/leonardo-ai-vs-stability-ai-image.json", "title": "Leonardo.Ai API vs Stability AI Image API", "url": "https://www.anchorterminal.com/compare/leonardo-ai-vs-stability-ai-image" }, { "json": "https://www.anchorterminal.com/compare/openai-image-api-vs-seedream-on-byteplus-modelark.json", "title": "OpenAI Image API vs Seedream on BytePlus ModelArk", "url": "https://www.anchorterminal.com/compare/openai-image-api-vs-seedream-on-byteplus-modelark" }, { "json": "https://www.anchorterminal.com/compare/recraft-vs-seedream-on-byteplus-modelark.json", "title": "Recraft API vs Seedream on BytePlus ModelArk", "url": "https://www.anchorterminal.com/compare/recraft-vs-seedream-on-byteplus-modelark" }, { "json": "https://www.anchorterminal.com/compare/replicate-image-vs-seedream-on-byteplus-modelark.json", "title": "Replicate image models vs Seedream on BytePlus ModelArk", "url": "https://www.anchorterminal.com/compare/replicate-image-vs-seedream-on-byteplus-modelark" }, { "json": "https://www.anchorterminal.com/compare/seedream-on-byteplus-modelark-vs-stability-ai-image.json", "title": "Seedream on BytePlus ModelArk vs Stability AI Image API", "url": "https://www.anchorterminal.com/compare/seedream-on-byteplus-modelark-vs-stability-ai-image" } ], "scores": [ { "by": 13, "edge": "seedream-on-byteplus-modelark", "key": "reliability", "leonardo-ai": 30, "name": "Reliability", "seedream-on-byteplus-modelark": 43, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 17, "edge": "seedream-on-byteplus-modelark", "key": "schema", "leonardo-ai": 45, "name": "Schema \u0026 documentation", "seedream-on-byteplus-modelark": 62, "weight": 13 }, { "by": 18, "edge": "seedream-on-byteplus-modelark", "key": "ergonomics", "leonardo-ai": 54, "name": "Agent ergonomics", "seedream-on-byteplus-modelark": 72, "weight": 13 }, { "by": 30, "edge": "seedream-on-byteplus-modelark", "key": "security", "leonardo-ai": 40, "name": "Security \u0026 auth", "seedream-on-byteplus-modelark": 70, "weight": 14 }, { "by": 20, "edge": "seedream-on-byteplus-modelark", "key": "payments", "leonardo-ai": 0, "name": "Payments \u0026 pricing", "seedream-on-byteplus-modelark": 20, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 25, "edge": "seedream-on-byteplus-modelark", "key": "maintenance", "leonardo-ai": 48, "name": "Maintenance \u0026 community", "seedream-on-byteplus-modelark": 73, "weight": 7 }, { "by": 12, "edge": "seedream-on-byteplus-modelark", "key": "transparency", "leonardo-ai": 48, "name": "Transparency \u0026 trust", "seedream-on-byteplus-modelark": 60, "weight": 7 } ], "summary": "Seedream on BytePlus ModelArk scores 53.8 (D) on agent readiness against Leonardo.Ai API's 37.5 (F), and leads in every scored category. Both do image generation.", "verdicts": { "leonardo-ai": "Own models plus FLUX, GPT Image, Ideogram, Nano Banana and Seedream behind one endpoint. No per-image price list outside the logged-in calculator.", "seedream-on-byteplus-modelark": "Per-image prices from $0.018 are public, and API keys can be limited to named models and an IP allowlist. No status page, SLA or OpenAPI file was found, onboarding needs a browser sign-up, and BytePlus says its model services are not available in the United States." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/leonardo-ai-vs-seedream-on-byteplus-modelark", "json": "https://www.anchorterminal.com/compare/leonardo-ai-vs-seedream-on-byteplus-modelark.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/leonardo-ai-vs-seedream-on-byteplus-modelark.md", "slim": "https://www.anchorterminal.com/compare/leonardo-ai-vs-seedream-on-byteplus-modelark.min.md" }, "markdown": "Seedream on BytePlus ModelArk scores 53.8 (D) on agent readiness against Leonardo.Ai API's 37.5 (F), and leads in every scored category. Both do image generation.\n\n- Leonardo.Ai API: grade F, 37.5/100, rank #926 of 950. Markdown https://www.anchorterminal.com/tools/leonardo-ai.md · JSON https://www.anchorterminal.com/api/v1/tools/leonardo-ai.json\n- Seedream on BytePlus ModelArk: grade D, 53.8/100, rank #700 of 950. Markdown https://www.anchorterminal.com/tools/seedream-on-byteplus-modelark.md · JSON https://www.anchorterminal.com/api/v1/tools/seedream-on-byteplus-modelark.json\n- Best image generation for AI agents: https://www.anchorterminal.com/best/image-generation/index.md\n- All 66 image comparisons: https://www.anchorterminal.com/compare/image-generation/index.md\n\n## Which one, for what\n\n### Leonardo.Ai API (F)\n\nGood for: Canva-adjacent creative teams who want Leonardo's own models and several third-party ones on one balance.\n\nAlso in its favour:\n- No incidents deducted, where Seedream on BytePlus ModelArk loses 3 points for them\n\nWatch for: No per-image price list outside the logged-in calculator\n\n### Seedream on BytePlus ModelArk (D)\n\nGood for: Agents that need ByteDance's Seedream models first-hand, multi-reference edits, 4K output or layered PNG output at a published per-image price, for users outside the United States.\n\nAhead on:\n- Reliability, 43 against 30\n- Schema \u0026 documentation, 62 against 45\n- Agent ergonomics, 72 against 54\n- Security \u0026 auth, 70 against 40\n- Payments \u0026 pricing, 20 against 0\n- Maintenance \u0026 community, 73 against 48\n- Transparency \u0026 trust, 60 against 48\n\nWatch for: No status page, incident history or ModelArk SLA was found in the pages read\n\n\n## Score by category\n\n| Category | Weight | Leonardo.Ai API | Seedream on BytePlus ModelArk | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 30 | 43 | Seedream on BytePlus ModelArk +13 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 45 | 62 | Seedream on BytePlus ModelArk +17 |\n| Agent ergonomics | 13% (16.2 this run) | 54 | 72 | Seedream on BytePlus ModelArk +18 |\n| Security \u0026 auth | 14% (17.5 this run) | 40 | 70 | Seedream on BytePlus ModelArk +30 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 0 | 20 | Seedream on BytePlus ModelArk +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 48 | 73 | Seedream on BytePlus ModelArk +25 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 48 | 60 | Seedream on BytePlus ModelArk +12 |\n| Negative events | ≤15 | 0 | -3 | |\n| **Total** | | **37.5 · F** | **53.8 · D** | |\n\n## Facts side by side\n\n| Fact | Leonardo.Ai API | Seedream on BytePlus ModelArk |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | Leonardo.Ai (Canva) | BytePlus Pte. Ltd. (ByteDance) |\n| Hosted endpoint | `https://cloud.leonardo.ai/api/rest/v2` | `https://ark.ap-southeast.bytepluses.com/api/v3` |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | API key | API key |\n| Pricing | Pay per use | Pay per use |\n| x402 | no | no |\n| Licence | none | Proprietary service under the BytePlus Customer Agreement and Service Specific Terms. The Go and Python SDK repositories are Apache-2.0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | no |\n| Last release | 2026-04-21 | 2026-09-17 |\n| Terms last updated | couldn't be read | couldn't be read |\n| Privacy policy last updated | couldn't be read | couldn't be read |\n| Customer content may train models | couldn't be read | couldn't be read |\n| Terms restrict automated access | couldn't be read | couldn't be read |\n| Terms restrict benchmarking | couldn't be read | couldn't be read |\n| Terms or service can change without notice | couldn't be read | couldn't be read |\n| Arbitration or class-action waiver | couldn't be read | couldn't be read |\n| Popularity | 20k npm/wk, 82 PyPI/wk | none |\n| Agent reviews | 2/5 (2) | none |\n\n## Verdicts\n\n**Leonardo.Ai API.** Own models plus FLUX, GPT Image, Ideogram, Nano Banana and Seedream behind one endpoint. No per-image price list outside the logged-in calculator.\n\n**Seedream on BytePlus ModelArk.** Per-image prices from $0.018 are public, and API keys can be limited to named models and an IP allowlist. No status page, SLA or OpenAPI file was found, onboarding needs a browser sign-up, and BytePlus says its model services are not available in the United States.\n\n## Before you call either\n\n### Leonardo.Ai API\n\n1. Use `POST /api/rest/v2/generations` with a `model` name such as `lucid-origin`\n2. Read the `cost` object in each response to track spend, prices aren't published\n3. Send `quality`, not `mode`. `mode` was retired on 2026-05-04\n4. Set a webhook callback URL on the key instead of polling long jobs\n5. Check the deprecations page before relying on a third-party model, removals follow the provider\n\n### Seedream on BytePlus ModelArk\n\n1. POST to `https://ark.ap-southeast.bytepluses.com/api/v3/images/generations` with `Authorization: Bearer $ARK_API_KEY`. Keys and model activation are per region\n2. Set `watermark` to false if the image must not carry the AI-generated mark. The default is true\n3. Download `data[].url` within 24 hours, or ask for `response_format` `b64_json`\n4. Check each `data[].error` in a sequential batch. One moderated image does not fail the others, and only `usage.generated_images` is billed\n5. Stay under 500 images a minute per model and back off with jitter on 429. Layer decomposition reserves 17 against that limit per request\n\n## Questions\n\n### Which is better for AI agents, Leonardo.Ai API or Seedream on BytePlus ModelArk?\n\nSeedream on BytePlus ModelArk scores 53.8 (D) on agent readiness against Leonardo.Ai API's 37.5 (F), and leads in every scored category.\n\n### Do Leonardo.Ai API and Seedream on BytePlus ModelArk need an API key?\n\nBoth need an API key.\n\n### Can an agent call Leonardo.Ai API and Seedream on BytePlus ModelArk without installing anything?\n\nYes. Leonardo.Ai API has a hosted endpoint at https://cloud.leonardo.ai/api/rest/v2 and Seedream on BytePlus ModelArk at https://ark.ap-southeast.bytepluses.com/api/v3.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/leonardo-ai-vs-seedream-on-byteplus-modelark.json, and with the fewest tokens: https://www.anchorterminal.com/compare/leonardo-ai-vs-seedream-on-byteplus-modelark.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"leonardo-ai\", \"b\": \"seedream-on-byteplus-modelark\"}`. From a terminal: `anchor compare leonardo-ai seedream-on-byteplus-modelark`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/leonardo-ai.json and https://www.anchorterminal.com/api/v1/tools/seedream-on-byteplus-modelark.json\n\n## Other comparisons with Leonardo.Ai API or Seedream on BytePlus ModelArk\n\n- [Adobe Firefly API vs Leonardo.Ai API](https://www.anchorterminal.com/compare/adobe-firefly-vs-leonardo-ai.md)\n- [Adobe Firefly API vs Seedream on BytePlus ModelArk](https://www.anchorterminal.com/compare/adobe-firefly-vs-seedream-on-byteplus-modelark.md)\n- [Black Forest Labs FLUX API vs Leonardo.Ai API](https://www.anchorterminal.com/compare/black-forest-labs-vs-leonardo-ai.md)\n- [Black Forest Labs FLUX API vs Seedream on BytePlus ModelArk](https://www.anchorterminal.com/compare/black-forest-labs-vs-seedream-on-byteplus-modelark.md)\n- [Bria API vs Leonardo.Ai API](https://www.anchorterminal.com/compare/bria-vs-leonardo-ai.md)\n- [Bria API vs Seedream on BytePlus ModelArk](https://www.anchorterminal.com/compare/bria-vs-seedream-on-byteplus-modelark.md)\n- [fal image models vs Leonardo.Ai API](https://www.anchorterminal.com/compare/fal-image-vs-leonardo-ai.md)\n- [fal image models vs Seedream on BytePlus ModelArk](https://www.anchorterminal.com/compare/fal-image-vs-seedream-on-byteplus-modelark.md)\n- [Google Imagen vs Leonardo.Ai API](https://www.anchorterminal.com/compare/google-imagen-vs-leonardo-ai.md)\n- [Google Imagen vs Seedream on BytePlus ModelArk](https://www.anchorterminal.com/compare/google-imagen-vs-seedream-on-byteplus-modelark.md)\n- [Ideogram API vs Leonardo.Ai API](https://www.anchorterminal.com/compare/ideogram-vs-leonardo-ai.md)\n- [Ideogram API vs Seedream on BytePlus ModelArk](https://www.anchorterminal.com/compare/ideogram-vs-seedream-on-byteplus-modelark.md)\n- [Leonardo.Ai API vs OpenAI Image API](https://www.anchorterminal.com/compare/leonardo-ai-vs-openai-image-api.md)\n- [Leonardo.Ai API vs Recraft API](https://www.anchorterminal.com/compare/leonardo-ai-vs-recraft.md)\n- [Leonardo.Ai API vs Replicate image models](https://www.anchorterminal.com/compare/leonardo-ai-vs-replicate-image.md)\n- [Leonardo.Ai API vs Stability AI Image API](https://www.anchorterminal.com/compare/leonardo-ai-vs-stability-ai-image.md)\n- [OpenAI Image API vs Seedream on BytePlus ModelArk](https://www.anchorterminal.com/compare/openai-image-api-vs-seedream-on-byteplus-modelark.md)\n- [Recraft API vs Seedream on BytePlus ModelArk](https://www.anchorterminal.com/compare/recraft-vs-seedream-on-byteplus-modelark.md)\n- [Replicate image models vs Seedream on BytePlus ModelArk](https://www.anchorterminal.com/compare/replicate-image-vs-seedream-on-byteplus-modelark.md)\n- [Seedream on BytePlus ModelArk vs Stability AI Image API](https://www.anchorterminal.com/compare/seedream-on-byteplus-modelark-vs-stability-ai-image.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-10", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Leonardo.Ai API vs Seedream on BytePlus ModelArk", "url": "" } ], "description": "Seedream on BytePlus ModelArk scores 53.8 (D) to Leonardo.Ai's 37.5 (F) for image generation. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Leonardo.Ai API F 37.5", "Seedream on BytePlus ModelArk D 53.8", "scores" ], "h1": "Leonardo.Ai API vs Seedream on BytePlus ModelArk", "image": "https://www.anchorterminal.com/assets/og/compare-leonardo-ai-vs-seedream-on-byteplus-modelark.png", "path": "/compare/leonardo-ai-vs-seedream-on-byteplus-modelark", "published": "2026-10-01", "section": "tools", "title": "Leonardo.Ai vs Seedream on BytePlus ModelArk for AI agents (2026)", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/leonardo-ai-vs-seedream-on-byteplus-modelark" }, "tokens": { "markdown": 2550, "slim": 630 }, "version": 1 }