# Ideogram API vs Leonardo.Ai API

> Ideogram API has a score of 50.3 (D) against Leonardo.Ai API's 37.8 (F). Both do image generate. The largest gap is reliability, 35 points. Category scores, facts, verdicts and agent notes side by side.

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- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-05

Ideogram API has a score of 50.3 (D) against Leonardo.Ai API's 37.8 (F). Both do image generate. The largest gap is reliability, 35 points.

- Ideogram API: grade D, 50.3/100, rank #360 of 452. Markdown https://www.anchorterminal.com/tools/ideogram.md · JSON https://www.anchorterminal.com/api/v1/tools/ideogram.json
- Leonardo.Ai API: grade F, 37.8/100, rank #433 of 452. Markdown https://www.anchorterminal.com/tools/leonardo-ai.md · JSON https://www.anchorterminal.com/api/v1/tools/leonardo-ai.json

## Which one, for what

Pick Ideogram API for reliability (+35), schema & documentation (+31), agent ergonomics (+9), payments & pricing (+20).

Pick Leonardo.Ai API for security & auth (+5), maintenance & community (+30).

## Score by category

| Category | Weight | Ideogram API | Leonardo.Ai API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 65 | 30 | Ideogram API +35 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 76 | 45 | Ideogram API +31 |
| Agent ergonomics | 13% (16.2 this run) | 63 | 54 | Ideogram API +9 |
| Security & auth | 14% (17.5 this run) | 35 | 40 | Leonardo.Ai API +5 |
| Payments & pricing | 10% (12.5 this run) | 20 | 0 | Ideogram API +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 18 | 48 | Leonardo.Ai API +30 |
| Transparency & trust | 7% (8.8 this run) | 52 | 51 | Ideogram API +1 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **50.3 · D** | **37.8 · F** | |

## Facts side by side

| Fact | Ideogram API | Leonardo.Ai API |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Ideogram | Leonardo.Ai (Canva) |
| Hosted endpoint | `https://api.ideogram.ai/v1` | `https://cloud.leonardo.ai/api/rest/v2` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | none | none |
| Tools exposed | none | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | not listed |
| Last release | none | 2026-04-21 |
| Popularity | none | 20k npm/wk, 82 PyPI/wk |
| Agent reviews | 3.5/5 (2) | 2/5 (2) |

## Verdicts

**Ideogram API.** Text rendering and layout control are the model's focus. Six API incidents in 90 days, three on v3 endpoints between 23 and 29 September.

**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.

## Before you call either

### Ideogram API

1. Send multipart form data, not JSON
2. Treat 402 as no credit or no payment method, and 422 as an unsafe prompt to rewrite, not retry
3. Check `is_image_safe`. When it's false the `url` is empty
4. Download images straight away, the links expire
5. Use the `/async/` variants with `webhook_url` for batches and verify the Ed25519 signature

### Leonardo.Ai API

1. Use `POST /api/rest/v2/generations` with a `model` name such as `lucid-origin`
2. Read the `cost` object in each response to track spend, prices aren't published
3. Send `quality`, not `mode`. `mode` was retired on 2026-05-04
4. Set a webhook callback URL on the key instead of polling long jobs
5. Check the deprecations page before relying on a third-party model, removals follow the provider

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