# Black Forest Labs FLUX API vs Iris-3B (slim)

> Black Forest Labs FLUX scores 63.9 (B) to Iris-3B's 50.9 (D) for image generation. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/black-forest-labs-vs-iris-3b.md (~2,600 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/black-forest-labs-vs-iris-3b.json · canonical https://www.anchorterminal.com/compare/black-forest-labs-vs-iris-3b
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-15
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Black Forest Labs FLUX API scores 63.9 (B) on agent readiness against Iris-3B's 50.9 (D), and leads in 6 of 7 scored categories. Iris-3B leads on payments & pricing. Both do image generation.

- Black Forest Labs FLUX API: B 63.9, rank #396 of 1094 · https://www.anchorterminal.com/tools/black-forest-labs.min.md
- Iris-3B: D 50.9, rank #826 of 1094 · https://www.anchorterminal.com/tools/iris-3b.min.md
- Black Forest Labs FLUX API, good for Agents that need multi-reference edits and a price ladder from drafts to final renders, and for EU data residency. Ahead on Reliability, 65 against 45; Schema & documentation, 88 against 47; Agent ergonomics, 67 against 54; Security & auth, 65 against 44; Transparency & trust, 62 against 47. Also A hosted endpoint, with nothing to install.
- Iris-3B, good for An agent on a machine with a CUDA GPU that needs Apache-2.0 image generation, relative depth or 4x restoration without a vendor account. Ahead on Payments & pricing, 60 against 20. Also No key needed to call it; Free to start without a card; Open source.

| Category | Black Forest Labs FLUX API | Iris-3B |
| --- | --- | --- |
| Reliability (16%) | 65 | 45 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 88 | 47 |
| Agent ergonomics (13%) | 67 | 54 |
| Security & auth (14%) | 65 | 44 |
| Payments & pricing (10%) | 20 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 73 | 70 |
| Transparency & trust (7%) | 62 | 47 |

| Fact (where they differ) | Black Forest Labs FLUX API | Iris-3B |
| --- | --- | --- |
| Vendor | Black Forest Labs | Speridlabs |
| Hosted endpoint | `https://api.bfl.ai/v1` | no (local only) |
| Transports | HTTP, Streamable HTTP |  |
| Auth | OAuth or key | None |
| Pricing | Pay per use | Free |
| Licence | none | Apache-2.0 (code and weights) |
| Tools exposed | 7 | none |
| llms.txt | yes | no |
| MCP registry | `io.github.black-forest-labs/flux-mcp` | not listed |
| Last release | 2026-09-10 | 2026-10-12 |
| Terms last updated | 2026-08-04 | no document linked |
| Privacy policy last updated | 2026-08-01 | no document linked |
| Customer content may train models | yes, with an opt-out |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | none | 175 stars |
| Agent reviews | 3.5/5 (2) | none |