Model Details
Where is Claude Fable 5.1 a perfect fit?
- Long-running autonomous coding agents
- Large-scale software engineering and repository modification
- Scientific and technical research
- Complex debugging and root-cause analysis
- Multi-step knowledge-work automation
- Large document and codebase analysis
- Agentic terminal and computer workflows
- Enterprise projects requiring sustained reasoning and planning
Quick Model Estimate
Your Claude Fable 5.1 Cost Estimate
💰 Total Cost
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for 1000 input + 1000 output tokens
Cost Breakdown
Prices are watched for changes and checked against the provider's own page.
Pricing
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Context Size
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 Anthropic60-min cache | Text | Standard | $10.0000 | $50.0000 | $0.2500 | $20.0000 | 1,000,000 tokens | → |
| Anthropic | Text | Batch | $5.0000 | $25.0000 | N/A | N/A | 1,000,000 tokens | → |
 Perplexity | Text | Standard | $10.0000 | $50.0000 | $0.2500 | N/A | 1,000,000 tokens | → |
Benchmarks
Scores from standardized evaluations by Artificial Analysis and Design Arena. Higher is better — the indices summarize overall ability, while the detailed scores break down performance on individual benchmarks.
Artificial Analysis
Higher is better · benchmarked by Artificial AnalysisGraduate-level questions in biology, chemistry & physics
Expert-level questions across many academic domains
Unpublished physics research reasoning problems
Long-context reasoning across large inputs
Research-level scientific coding tasks
Economically valuable, real-world knowledge work
Breadth of factual knowledge across domains
How reliably the model avoids fabricated answers
| Variant | GPQA Diamond | Humanity's Last Exam | AA-LCR | SciCode | CritPt | GDPval | Omniscience Accuracy | Omniscience Non-Hallucination |
|---|---|---|---|---|---|---|---|---|
| Claude Fable 5.1 (Adaptive Reasoning, Max Effort, | 93.7% | 59.1% | 85.3% | 63.1% | 29.7% | 61.7% | 67.2% | 27.4% |
| Claude Fable 5.1 (Max, Default Fallback) | 93.7% | 59.1% | 85.3% | 63.1% | 29.7% | 62.7% | 67.2% | 27.4% |
| Claude Fable 5.1 (Xhigh, Default Fallback) | 93.4% | 58.7% | 83% | 60.9% | 31.1% | 61.6% | 66.2% | 29.5% |
| Claude Fable 5.1 (High, Default Fallback) | 90.6% | 55.9% | 83.7% | 58.7% | 30.3% | 56.8% | 64.9% | 31.2% |
| Claude Fable 5.1 (Medium, Default Fallback) | 88.6% | 53.8% | 84.7% | 56.4% | 29.1% | 52.2% | 63.1% | 30.9% |
| Claude Fable 5.1 (Low, Default Fallback) | 88.1% | 48.9% | 82.3% | 56.7% | 27.7% | 48.4% | 60.2% | 34.4% |
Design Arena
Elo rating by arena & category| Variant | Arena | Category | Elo | Win % | Percentile | Avg time (ms) |
|---|---|---|---|---|---|---|
| claude-fable-5-1 | agents | fullstack | 1,326 | 57.2% | 98 | — |
| claude-fable-5-1 | agents | godotgamedev | 1,327 | 60.7% | 97 | — |
| claude-fable-5-1 | agents | htmlslides | 1,394 | 56.5% | 96 | — |
| claude-fable-5-1 | agents | mobileapps | 1,265 | 56.3% | 90 | — |
| claude-fable-5-1 | agents | python-pptxslides | 1,318 | 60.8% | 96 | — |
| claude-fable-5-1 | agents | spreadsheet | 1,416 | 70.4% | 96 | — |
| claude-fable-5-1 | agents | webapps | 1,318 | 56.1% | 96 | — |
| claude-fable-5-1 | models | 3d | 1,390 | 67.7% | 95 | 304,684 |
| claude-fable-5-1 | models | asciiart | 1,321 | 65% | 95 | 188,435 |
| claude-fable-5-1 | models | codecategories | 1,335 | 59.3% | 94 | 323,413 |
| claude-fable-5-1 | models | dataviz | 1,344 | 61.8% | 97 | 242,746 |
| claude-fable-5-1 | models | gamedev | 1,381 | 65.6% | 96 | 380,919 |
| claude-fable-5-1 | models | svg | 1,296 | 56.4% | 92 | 79,029 |
| claude-fable-5-1 | models | uicomponent | 1,333 | 59.6% | 92 | 215,969 |
| claude-fable-5-1 | models | website | 1,312 | 56.3% | 94 | 323,669 |
Compare Claude Fable 5.1 with
Two models side by side: worked costs, every rate, and every benchmark figure both of them report.
Other Models in the Claude 5.1 Family
FAQs about Claude Fable 5.1
How much does Claude Fable 5.1 cost per 1M tokens?
Claude Fable 5.1 costs between $5.00 and $10.00 per million input tokens, and between $25.00 and $50.00 per million output tokens. The range covers Standard and Batch pricing.
What does a typical workload cost with Claude Fable 5.1?
1,000 requests of 2,000 input and 500 output tokens each — 2,000,000 input and 500,000 output tokens in total — costs $22.50 with Claude Fable 5.1 at its lowest rates. Use the calculator on this page for your own volumes.
Which provider is cheapest for Claude Fable 5.1?
Anthropic has the lowest input rate for Claude Fable 5.1, at $5.00 per million tokens. Across all providers: Anthropic from $5.00 and Perplexity from $10.00 per million input tokens.
Is there cheaper Claude Fable 5.1 pricing than the standard rate?
Yes. Batch pricing for Claude Fable 5.1 starts at $5.00 per million input tokens against $10.00 on the standard tier, about 50% lower.
What is Claude Fable 5.1's context window?
Claude Fable 5.1 has a context window of 1,000,000 tokens, and returns up to 128,000 tokens in a single response.
What input types does Claude Fable 5.1 support?
Claude Fable 5.1 accepts text, image and file input, and returns text.
What is Claude Fable 5.1's knowledge cutoff?
Claude Fable 5.1's training data runs to 30 June 2026. It has no built-in knowledge of events after that date.