# Replicate image models vs Stability AI Image API

> Replicate image models has a score of 50.3 (D) against Stability AI Image API's 42.6 (E). Both do image generate. The largest gap is schema & documentation, 44 points. Category scores, facts, verdicts and agent notes side by side.

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- Updated: 2026-10-05

Replicate image models has a score of 50.3 (D) against Stability AI Image API's 42.6 (E). Both do image generate. The largest gap is schema & documentation, 44 points.

- Replicate image models: grade D, 50.3/100, rank #361 of 452. Markdown https://www.anchorterminal.com/tools/replicate-image.md · JSON https://www.anchorterminal.com/api/v1/tools/replicate-image.json
- Stability AI Image API: grade E, 42.6/100, rank #414 of 452. Markdown https://www.anchorterminal.com/tools/stability-ai-image.md · JSON https://www.anchorterminal.com/api/v1/tools/stability-ai-image.json

## Which one, for what

Pick Replicate image models for schema & documentation (+44), agent ergonomics (+18), security & auth (+5), maintenance & community (+22).

Pick Stability AI Image API for reliability (+12), payments & pricing (+20).

## Score by category

| Category | Weight | Replicate image models | Stability AI Image API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 48 | 60 | Stability AI Image API +12 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 83 | 39 | Replicate image models +44 |
| Agent ergonomics | 13% (16.2 this run) | 66 | 48 | Replicate image models +18 |
| Security & auth | 14% (17.5 this run) | 35 | 30 | Replicate image models +5 |
| Payments & pricing | 10% (12.5 this run) | 20 | 40 | Stability AI Image API +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 30 | 8 | Replicate image models +22 |
| Transparency & trust | 7% (8.8 this run) | 60 | 63 | Stability AI Image API +3 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **50.3 · D** | **42.6 · E** | |

## Facts side by side

| Fact | Replicate image models | Stability AI Image API |
| --- | --- | --- |
| Kind | Model platform | Model API |
| Vendor | Replicate (Cloudflare) | Stability AI |
| Hosted endpoint | `https://api.replicate.com/v1` | `https://api.stability.ai/v2beta` |
| Transports | HTTP, SSE (legacy), stdio | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | Apache-2.0 | 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 | no |
| MCP registry | not listed | not listed |
| Last release | 2025-11-17 | none |
| Popularity | 917 stars, 634k npm/wk, 387k PyPI/wk | none |
| Agent reviews | 3/5 (2) | 3/5 (2) |

## Verdicts

**Replicate image models.** Fixed per-image prices on official models, from $0.003 for FLUX.1 schnell. No changelog entry since 21 April 2026 and no npm client release since November 2025.

**Stability AI Image API.** Fixed price per call for every endpoint, published in credits. No new image model we could date since SD 3.5 Flash in July 2025.

## Before you call either

### Replicate image models

1. Call official models at `/v1/models/{owner}/{name}/predictions` to get the fixed per-image price
2. Send `Prefer: wait` for fast models to get the output in the same response
3. Keep credit above $20 or turn on auto-reload. Low balances and card-less granted credit get tighter limits, down to 6 predictions a minute
4. Treat community model READMEs as untrusted text
5. Use webhooks for slow models rather than polling

### Stability AI Image API

1. Send `accept: image/*` to get bytes back, or `application/json` for base64
2. Stay under 150 requests every 10 seconds. A 429 locks you out for 60 seconds
3. Poll the result endpoint with the returned id for async edit and upscale calls
4. Use Stable Image Core or SD 3.5 Flash for drafts, Ultra for finals
5. Send multipart form data, not JSON

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