Claude Mythos Preview DeprecatedLimited access
Claude Mythos Preview is a model from Anthropic, listed under Language models. It was released in April 2026. Anthropic points to Claude Mythos 5.1 as its replacement.
This model is scheduled for retirement. Plan a migration.
Only available to organisations approved by the provider.
Recommended replacement: Claude Mythos 5.1
- Headline price
- No data
Current prices
No public API price
This model is distributed as open weights. Running cost depends on your own hardware.
Price history
No price change recorded for this model yet.
Alternatives
Same category, closest price, other providers first.
More from Anthropic
| # | Model | Input | Output | Context | Released | Capabilities | Price change |
|---|---|---|---|---|---|---|---|
| 1 |
Claude Fable 5.1
Anthropic
|
$10.00 | $50.00 | 1M | September 2026 | VisionReasoningTool calling | |
| 2 |
Claude Opus 5.5
Anthropic
|
$4.00 | $20.00 | 1M | September 2026 | VisionReasoningTool calling | |
| 3 |
Claude Sonnet 5.5
Anthropic
|
$2.00 | $10.00 | 1M | September 2026 | VisionReasoningTool calling | |
| 4 |
Claude Haiku 5.5
Anthropic
|
$0.10 | $0.50 | 1M | October 2026 | VisionReasoningTool calling | |
| 5 |
Claude Mythos 5.1
Limited access
Anthropic
|
$10.00 | $50.00 | 1M | September 2026 | VisionReasoningTool calling |
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Frequently asked questions
Is Claude Mythos Preview still available?
It still works, but it is deprecated: Anthropic plans to retire it. Anthropic points to Claude Mythos 5.1 as its replacement.
When was Claude Mythos Preview released?
Claude Mythos Preview was released in April 2026.
What is the API model ID for Claude Mythos Preview?
Use claude-mythos-preview when calling the Anthropic API.
What are the alternatives to Claude Mythos Preview?
Models in the same category at a similar price include Claude Mythos 5.1 (Anthropic), Mistral Medium 3.5 (Mistral AI), Grok 4.3 (xAI) and Command A+ (Cohere).