OpenAI: o1-pro vs Anthropic: Claude Fable 5.1 — pricing compared

Side-by-side API pricing for OpenAI: o1-pro and Anthropic: Claude Fable 5.1, normalized to $/1M tokens from the live OpenRouter feed.

Token Price Index › Browse › OpenAI: o1-pro vs Anthropic: Claude Fable 5.1

On blended cost, Anthropic: Claude Fable 5.1 ($20.00/M) is about 92% cheaper than OpenAI: o1-pro ($262/M) per 1M tokens. Anthropic: Claude Fable 5.1 wins on input price, Anthropic: Claude Fable 5.1 on output, and Anthropic: Claude Fable 5.1 has the larger context window.

Subscribe — $9/mo
ModelContextInput $/MOutput $/MBlended $/M
OpenAI: o1-provision
openai
200,000$150/M$600/M$262/M
Anthropic: Claude Fable 5.1visioncache
anthropic
1,000,000$10.00/M$50.00/M$20.00/M

Frequently asked questions

Is OpenAI: o1-pro or Anthropic: Claude Fable 5.1 cheaper?
On a blended basis Anthropic: Claude Fable 5.1 is cheaper at $20.00/M per 1M tokens versus $262/M for OpenAI: o1-pro — about 92% less. Blended weights input 3:1 over output.
OpenAI: o1-pro vs Anthropic: Claude Fable 5.1: input token cost?
OpenAI: o1-pro charges $150/M per 1M input tokens; Anthropic: Claude Fable 5.1 charges $10.00/M. Anthropic: Claude Fable 5.1 is cheaper on input.
OpenAI: o1-pro vs Anthropic: Claude Fable 5.1: output token cost?
OpenAI: o1-pro charges $600/M per 1M output tokens; Anthropic: Claude Fable 5.1 charges $50.00/M. Anthropic: Claude Fable 5.1 is cheaper on output.
Which has the larger context window, OpenAI: o1-pro or Anthropic: Claude Fable 5.1?
OpenAI: o1-pro supports 200,000 tokens and Anthropic: Claude Fable 5.1 supports 1,000,000 tokens, so Anthropic: Claude Fable 5.1 handles longer inputs in a single call.
How do I track OpenAI: o1-pro and Anthropic: Claude Fable 5.1 price changes?
Token Price Index Pro ($9/mo) emails you the instant either model changes price, so a hike never catches you out.

Get price-drop alerts for models you use

$9/mo · cancel anytime

Pro subscribers get emailed the instant a model they track drops in price, plus a weekly cheapest-per-task digest and full CSV/JSON export.

Subscribe — $9/mo
Data: OpenRouter public model API, normalized to $/1M tokens. Blended = (3×input + output)/4. Generated 19 Oct 2026 22:00 UTC. Prices change often — confirm on the provider before committing spend.