AnthropicreasoningClaude Fable 5.1 pricing
$10.00 per 1M input tokens and $50.00 per 1M output tokens. In real work that is 6.3¢ per chat answer and 22¢ to summarize a 20-page PDF.
Official price at Anthropic: $10.00 / $50.00 per 1M, cached $0.25 (source, verified Oct 18, 2026).
What Claude Fable 5.1 costs per task
Token counts estimated from a measured model of the same lab (Claude Sonnet 5.5), rescaled by tokenizer. Reasoning tokens are billed as output.
| Task | Cost | Tokens used | Price rank | Basis |
|---|---|---|---|---|
| Answer a chat question | 6.3¢$63.41 / 1,000 | 61 in · 1,256 out | 329 of 336 | estimated |
| Reply to a customer email | 2.0¢$19.87 / 1,000 | 362 in · 325 out | 322 of 336 | estimated |
| Write a 1,500-word blog post | 18¢$183 / 1,000 | 90 in · 3,401 out · 239 reasoning | 327 of 336 | estimated |
| Write 10 product descriptions | 22¢$221 / 1,000 | 454 in · 1,866 out · 2,459 reasoning | 333 of 336 | estimated |
| Translate 1,000 words | 13¢$128 / 1,000 | 1,832 in · 2,186 out | 322 of 336 | estimated |
| Proofread one page (500 words) | 5.6¢$55.52 / 1,000 | 987 in · 913 out | 323 of 336 | estimated |
| Summarize a 20-page PDF | 22¢$223 / 1,000 | 18,004 in · 857 out | 326 of 336 | estimated |
| Extract data from an invoice | 5.2¢$51.51 / 1,000 | 546 in · 604 out · 317 reasoning | 326 of 336 | estimated |
| Analyze a 200-row spreadsheet | ≥85¢$854 / 1,000 | 5,433 in · 0 out · 16,000 reasoning | 329 of 336 | estimated |
| Answer from 5 retrieved documents (RAG) | 14¢$137 / 1,000 | 5,184 in · 1,079 out · 615 reasoning | 329 of 336 | estimated |
| Classify 100 support tickets | 4.5¢$44.52 / 1,000 | 1,747 in · 541 out | 302 of 336 | estimated |
| Review 500 lines of code | 40¢$398 / 1,000 | 7,117 in · 3,067 out · 3,476 reasoning | 328 of 336 | estimated |
| Write a SQL query | 5.5¢$54.67 / 1,000 | 182 in · 839 out · 218 reasoning | 327 of 336 | estimated |
| Run a 50-step coding agent | $3.46$3,461 / 1,000 | 3,101,175 in · 20,790 out · 10,900 reasoning | 311 of 336 | modeled |
Price at every provider
List prices per 1M tokens (input / output) at each host serving Claude Fable 5.1 through OpenRouter today. Hosts can differ in quantization, context and speed.
| Provider | Input / output | Cached input | Context | Uptime |
|---|---|---|---|---|
 Azureunknown | $10.00 / $50.00 | $0.25 | 1M | |
Anthropicunknown | $10.00 / $50.00 | $0.25 | 1M | 100% |
 Amazon Bedrockunknown | $10.00 / $50.00 | $0.25 | 1M | |
 Googleunknown | $10.00 / $50.00 | $0.25 | 1M | 100% |
Price history
First seen in our price history on Sep 2, 2026 at $10.00 input / $50.00 output. The list price has not changed since.
FAQ
How much does Claude Fable 5.1 cost?
Claude Fable 5.1 costs $10.00 per 1 million input tokens and $50.00 per 1 million output tokens, with cached input at $0.25 (list price on Oct 18, 2026). In practice one chat answer costs about 6.3¢ and summarizing a 20-page PDF about 22¢.
Where is Claude Fable 5.1 cheapest?
Among 4 providers we track, the lowest list price today is at Azure: $10.00 input and $50.00 output per 1M tokens.
Does Claude Fable 5.1 charge for reasoning tokens?
Yes. Reasoning (thinking) tokens are billed as output tokens. That is why the cost per task can be much higher than the visible answer suggests - our task costs include them.
Is the Claude Fable 5.1 cost per task measured or estimated?
Estimated: Claude Fable 5.1 was not run directly. Tokens come from Claude Sonnet 5.5 and are rescaled by the tokenizer of Anthropic. Real usage can differ.