Claude Mythos 5.1
Claude Mythos 5.1 is Anthropic's language model with a 1.0M context window and up to 128K output tokens, starting at $10.00 / 1M input and $50.00 / 1M output. A large language model in Anthropic's Claude family designed for creative and narrative-oriented tasks.
Capabilities
Input3/5
Text✓
Image✓
Audio·
Video·
PDF✓
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities6/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling·
Structured Outputs✓
Native JSON Schema✓
Web Search·
URL Context·
Computer Use✓
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·
Pricing by Provider
US Dollar ($)
Per 1M tokens
| Provider | Standard | Batch | |||||
|---|---|---|---|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | Cache Write 5m $ / 1M | Cache Write 1h $ / 1M | Input $ / 1M | Output $ / 1M | |
| $10.00 | $50.00 | $0.25 | $12.50 | $20.00 | $5.00 | $25.00 | |
Cost Calculator
US Dollar ($)
Preset:
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| Claude Mythos 5.1 | — | 1.0M | $10.00 | $50.00 | Current |
| Claude Mythos 5 | — | 1.0M | $10.00 | $50.00 | Available |
Other Models
| Model | Tier | Released | Context | Input / 1M | Output / 1M |
|---|---|---|---|---|---|
| Claude Fable 5.1 | — | 1.0M | $10.00 | $50.00 | |
| Claude Opus 5 | Opus | 1.0M | $5.00 | $25.00 | |
| Claude Sonnet 5 | Sonnet | 1.0M | $2.00 | $10.00 | |
| Claude Fable 5 | Fable | 1.0M | $10.00 | $50.00 | |
| Claude Fable 5.3 | Fable | — | — | — | — |
| Claude Opus 4.8 | Opus | 1.0M | $5.00 | $25.00 | |
| Claude Opus 4.7 | Opus | 1.0M | $5.00 | $25.00 | |
| Claude Sonnet 4.6 | Sonnet | 1.0M | $3.00 | $15.00 | |
| Claude Opus 4.6 | Opus | 1.0M | $5.00 | $25.00 | |
| Claude Opus 4.5 | Opus | 410K | $5.00 | $25.00 |