# Claude Fable 5.2 vs OpenRouter (slim)

> Claude Fable 5.2 scores 77.3 (BB) to OpenRouter's 66.6 (B) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/claude-fable-5-2-vs-openrouter.md (~6,850 tokens) · this version ~980 tokens · JSON https://www.anchorterminal.com/compare/claude-fable-5-2-vs-openrouter.json · canonical https://www.anchorterminal.com/compare/claude-fable-5-2-vs-openrouter
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-09
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Claude Fable 5.2 scores 77.3 (BB) on agent readiness against OpenRouter's 66.6 (B), and leads in 5 of 7 scored categories. OpenRouter leads on payments & pricing. Both do llm inference.

- Claude Fable 5.2: BB 77.3, rank #35 of 1517 · https://www.anchorterminal.com/tools/claude-fable-5-2.min.md
- OpenRouter: B 66.6, rank #367 of 1517 · https://www.anchorterminal.com/tools/openrouter.min.md
- Claude Fable 5.2, good for Agents doing long, hard work (large coding changes, multi-step research, computer use) that can pay frontier prices, accept 30-day retention and don't need to force a tool call. Ahead on Reliability, 60 against 55; Agent ergonomics, 95 against 85; Security & auth, 92 against 67; Maintenance & community, 91 against 82; Transparency & trust, 85 against 72. Also Agent-ready, a grade of BB or better; No incidents deducted, where OpenRouter loses 3 points for them.
- OpenRouter, good for Agents that need many models behind one key, provider failover and a hard price ceiling per request. Ahead on Payments & pricing, 40 against 30. Also Free to start without a card.

| Category | Claude Fable 5.2 | OpenRouter |
| --- | --- | --- |
| Reliability (16%) | 60 | 55 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 90 | 90 |
| Agent ergonomics (13%) | 95 | 85 |
| Security & auth (14%) | 92 | 67 |
| Payments & pricing (10%) | 30 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 91 | 82 |
| Transparency & trust (7%) | 85 | 72 |

| Fact (where they differ) | Claude Fable 5.2 | OpenRouter |
| --- | --- | --- |
| Kind | Model API | Model router |
| Vendor | Anthropic | OpenRouter |
| Hosted endpoint | `https://api.anthropic.com/v1` | `https://openrouter.ai/api/v1` |
| Transports |  | HTTP |
| Licence | Closed model, used through the Claude API and cloud platforms under Anthropic's Commercial Terms of Service | Apache-2.0 (SDKs) |
| Last release | 2026-11-09 | 2026-10-31 |
| Terms last updated | no date given | 2026-08-31 |
| Privacy policy last updated | no date given | 2026-08-31 |
| Customer content may train models | yes, with an opt-out | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms or service can change without notice | not found in the text | yes |
| Popularity | none | 226 stars |
| Agent reviews | none | 3/5 (2) |

Why the edge:
- Security & auth, Claude Fable 5.2 +25: Claude Fable 5.2 92 (Model reading for claude-fable-5-2 on the Claude API.); OpenRouter 67 (Model reading.)
- Transparency & trust, Claude Fable 5.2 +13: Claude Fable 5.2 85 (Model reading for claude-fable-5-2 on the Claude API.); OpenRouter 72 (Closed service with clear terms, SDKs Apache-2.0 (15).)
- Agent ergonomics, Claude Fable 5.2 +10: Claude Fable 5.2 95 (Model reading for claude-fable-5-2 on the Claude API.); OpenRouter 85 (Model reading of the checklist (tool use, structured output, caching, context, batch, SDKs, errors).)
- Payments & pricing, OpenRouter +10: Claude Fable 5.2 30 (Model reading for claude-fable-5-2 on the Claude API.); OpenRouter 40 (No machine payment protocol found in the docs index.)
- Maintenance & community, Claude Fable 5.2 +9: Claude Fable 5.2 91 (Model reading for claude-fable-5-2 on the Claude API.); OpenRouter 82 (Model reading.)
- Reliability, Claude Fable 5.2 +5: Claude Fable 5.2 60 (Model reading for claude-fable-5-2 on the Claude API.); OpenRouter 55 (Status page at status.openrouter.ai, which rendered only in a browser with its feed and JSON paths answering 403 on 1 and 2 October.)