Claude Fable 5.1
Claude Fable 5.1 is Anthropic's language model with a 1.0M context window and up to 128K output tokens, available from 7 providers, starting at $10.00 / 1M input and $50.00 / 1M output. A large language model in Anthropic's Claude family tuned for demanding reasoning and long-horizon agentic tasks with tool-use and vision support.
| Benchmarks | |
|---|---|
| Intelligence Index | #1 |
| Coding Index | #1 |
| GPQA | #5 |
| HLE | #1 |
| Time to First Token | #481 |
| SciCode | #1 |
| LCR | #7 |
| Output TPS | #170 |
Capabilities
Input3/5
Text✓
Image✓
Audio·
Video·
PDF✓
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities6/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling·
Structured Outputs✓
Native JSON Schema✓
Web Search·
URL Context·
Computer Use✓
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·
Pricing by Provider
US Dollar ($)
Per 1M tokens
| Provider | Standard | Batch | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | Cache Write 5m $ / 1M | Cache Write 1h $ / 1M | Web Search $ / request | Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | Cache Write 5m $ / 1M | Web Search $ / request | |
| $10.00 | $50.00 | $0.25 | $12.50 | $20.00 | N/A | — | — | — | — | — | |
| $10.00 | $50.00 | $0.25 | $12.50 | $20.00 | N/A | $5.00 | $25.00 | N/A | N/A | N/A | |
| $10.00 | $50.00 | $0.25 | $12.50 | $20.00 | N/A | — | — | — | — | — | |
| $10.00 | $50.00 | $0.25 | $12.50 | $20.00 | N/A | — | — | — | — | — | |
| $10.00 | $50.00 | $0.25 | $12.50 | N/A | $0.010 | N/A | N/A | N/A | N/A | N/A | |
| — | — | — | — | — | — | $5.00 | $25.00 | $0.125 | $6.25 | $0.010 | |
| $12.00 | $60.00 | N/A | N/A | N/A | N/A | $6.00 | $30.00 | N/A | N/A | N/A | |
| $10.00 | $50.00 | $0.25 | $12.50 | N/A | N/A | — | — | — | — | — | |
Cost Calculator
US Dollar ($)
Preset:
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| Claude Fable 5.1 | 1.0M | $10.00 | $50.00 | Current | |
| Claude Opus 5 | 1.0M | $5.00 | $25.00 | Deprecating | |
| Claude Sonnet 5 | 1.0M | $2.00 | $10.00 | Deprecating | |
| Claude Fable 5 | 1.0M | $10.00 | $50.00 | Available | |
| Claude Fable 5.3 | — | — | — | — | Available |
| Claude Mythos 5 | — | 1.0M | $10.00 | $50.00 | Available |
| Claude Mythos 5.1 | — | — | $10.00 | $50.00 | Available |
| Claude Opus 4.8 | 1.0M | $5.00 | $25.00 | Available | |
| Claude Opus 4.7 | 1.0M | $5.00 | $25.00 | Available | |
| Claude Sonnet 4.6 | 1.0M | $3.00 | $15.00 | Deprecating | |
| Claude Opus 4.6 | 1.0M | $5.00 | $25.00 | Deprecated |