--- title: "Anthropic: Claude Fable 5.1 — price, capability and what beats it · Undominated.ai" canonical: https://undominated.ai/models/anthropic__claude-fable-5.1/ description: "Anthropic: Claude Fable 5.1: $10.00/M in, $50.00/M out. Independent capability scores, and the models that are both better and cheaper." --- # Anthropic: Claude Fable 5.1 — price, capability and what beats it · Undominated.ai > Anthropic: Claude Fable 5.1: $10.00/M in, $50.00/M out. Independent capability scores, and the models that are both better and cheaper. MODEL PROOF # Claude Fable 5.1 Anthropic · 01 Sept 2026 Balanced Summarise Chat Code gen Agentic FRONTIER ## Nothing is both better and cheaper under this workload. **$20.00** / 1M tokens Balanced · 3 tokens in per 1 out Independent LMArena score 1,507.6 ± 8.15 · 5,783 votes Context window 1M Maximum output 128K Input modalities text, image, file Output modalities text Published input price $10.00 / 1M tokens Published output price $50.00 / 1M tokens Pricing kind fixed Evidence as of 19 Sept 2026 openrouter/models LMArena · cc-by-4.0 Copy link Share Download landscape card MODEL MONUMENT ## Save or share this proof Anthropic: Claude Fable 5.1. Balanced workload. Frontier. Evidence as of 19 Sept 2026. Download landscape card — 1200 by 630 pixels Download square card — 1080 by 1080 pixels Copy landscape image Share landscape card $10.00/M in, $50.00/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription. Nothing is both better and cheaper than Claude Fable 5.1. ### Every price dimension | Input | $10.00 /M | | --- | --- | | Output | $50.00 /M | | Cached input | $0.250 /M | | Cache write | $12.50 /M | | Cache write 1h | $20.00 /M | | Web search | $0.01 /call | ### Who sells it The same weights, different shops. Cheapest is not like-for-like when serving precision differs. | Seller | Input | Output | Precision | Uptime (1d) | | --- | --- | --- | --- | --- | | Seller Azure | Input $10.00 | Output $50.00 | Precision undeclared | Uptime (1d) 99.79% | | Seller Anthropic | Input $10.00 | Output $50.00 | Precision undeclared | Uptime (1d) 99.84% | | Seller Amazon Bedrock | Input $10.00 | Output $50.00 | Precision undeclared | Uptime (1d) — | | Seller Google | Input $10.00 | Output $50.00 | Precision undeclared | Uptime (1d) 99.75% | ### Independent scores | LMArena Elo | 1507.6 max | | --- | --- | LMArena Elo under CC BY 4.0. Absence of another board is not a score of zero. #### Best rankings by task - dataviz #1 of 106 1368 - svg #1 of 77 1347 - fullstack #1 of 41 1336 - webapps #1 of 39 1336 - python-pptxslides #1 of 26 1328 - gamedev #2 of 107 1402 - website #3 of 114 1322 - codecategories #3 of 108 1346 ### Capability | Context window | 1M | | --- | --- | | Max output | 128K | | Input modes | text, image, file | | Tool use | yes | | Reasoning | always on | ### Provenance | Price source | openrouter.ai | | --- | --- | | Fetched | 2026-09-19 | | Quality data | verified | Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual... ## Questions this page answers ### What does Claude Fable 5.1 cost? $10.00/M in, $50.00/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription. ### Does Claude Fable 5.1 have an independent quality score? Claude Fable 5.1 has an LMArena score in this catalogue. ### What beats Claude Fable 5.1? Nothing is both better and cheaper than Claude Fable 5.1. ### Does this page use Artificial Analysis scores for Claude Fable 5.1? No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated. [Check whether this is still the one to buy](/check/anthropic__claude-fable-5.1/) ## Related - Side by side [Claude Opus 5](/compare/anthropic__claude-fable-5.1--vs--anthropic__claude-opus-5/) - Nearby on the capability axis [Claude Opus 5](/models/anthropic__claude-opus-5/) - Same vendor [Claude Fable 5](/models/anthropic__claude-fable-5/) - Anthropic models [Anthropic](/providers/anthropic/) - Where this model appears [frontier](/frontier/) - Nearby on the capability axis [Claude Opus 4.6](/models/anthropic__claude-opus-4.6/) - Same vendor [Claude Opus 4.7](/models/anthropic__claude-opus-4.7/) - Where this model appears [knee](/knee/) - Nearby on the capability axis [Gemini 3.8 Flash](/models/google__gemini-3.8-flash/) - Same vendor [Claude Opus 4.8](/models/anthropic__claude-opus-4.8/) - Where this model appears [wire](/wire/) - Where this model appears [disagreement](/disagreement/) ## Badge The verdict as one SVG, for a README or a docs page. It states this model's dominance status at the balanced workload on the LMArena lens, with the date it was computed, and it is rebuilt with the catalogue — so it changes when the verdict changes, including to one you would rather it did not. Markdown Copy [![Claude Fable 5.1 — Undominated.ai dominance verdict](https://undominated.ai/badge/anthropic__claude-fable-5.1.svg)](https://undominated.ai/models/anthropic__claude-fable-5.1/) HTML Copy Claude Fable 5.1 — Undominated.ai dominance verdict Direct file: [https://undominated.ai/badge/anthropic__claude-fable-5.1.svg](https://undominated.ai/badge/anthropic__claude-fable-5.1.svg) — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never older than the last deploy.