AnthropicLanguage modelVerification required
Claude Mythos 5.2
Claude Mythos 5.2 has no overall index value yet because there are too few independent benchmark results.
n/aOverall indexhigher is better
n/ano measurement yet
Input $8 · Output $40
$16per 1M tokenslower is better
1Mtokens at once≈ 1,500 A4 pages
Summary
It is expensive: $16 per 1M tokens (input and output blended); a typical model costs $1.50.
Claude Mythos 5.2 is an API variant of Claude Fable 5.2 for verified organizations. Anthropic lists it under a separate model ID and limits access to its verification programs.
The API accepts text and images. It offers a one-million-token context window, up to 128,000 output tokens, and adaptive thinking with high as the default effort.
Prices
1 offer, prices in US dollars per 1M tokens, blended from 3 parts input and 1 part output.
| Provider | Input | Output | Cache read | Cache write | Blended |
|---|---|---|---|---|---|
| Anthropicdirect | $8 | $40 | $0.20 | $10 | $16 |
Direct price according to the developer, checked Nov 12, 2026. Open the LLM price index
Similar models
More models of the same kind as Claude Mythos 5.2, chosen by model line, developer, size, price and release date.
- Claude Fable 5.1Anthropic · same developer
- Claude Fable 5.2Anthropic · same developer
- Claude Opus 5Anthropic · same developer
- Claude Opus 5.5Anthropic · same developer
- Claude Fable 5Anthropic · same developer
- Claude Mythos 5Anthropic · same developer
- Claude Mythos 5.1Anthropic · same developer
- Claude Opus 4.7Anthropic · same developer
Cost for your load
1,000 requests with 2,000 input and 500 output tokens cost $36.00 with Claude Mythos 5.2. Enter your own load in the cost calculator
More about Claude Mythos 5.2
All specifications
Input and output
Watermarking and provenance
AI watermarking refers to invisible signals embedded in the output. Visible marks and provenance metadata are listed separately. Unknown means there is insufficient evidence for that particular field.
- AI watermarking
- Unknown
- no source
- Watermarking technique
- Not known
- no source
Licence and access
- Shutdown
- None announced
- no source
API
Further details
- Underlying model
- Anthropic identifies Claude Mythos 5.2 and Claude Fable 5.2 as sharing the same underlying model. Mythos is the separate API variant for verified organizations.
- Source: Underlying model
Frequently asked questions about Claude Mythos 5.2
How much does Claude Mythos 5.2 cost?
Through the API $8 per 1M input tokens and $40 output. That is expensive.
What is the knowledge cutoff of Claude Mythos 5.2?
June 2026, according to Anthropic. That is 5 months before release.
Stated by Anthropic
How large is the context window of Claude Mythos 5.2?
1 M tokens. That is how much text Claude Mythos 5.2 reads at once, about 1,500 A4 pages.
Page count as a rule of thumb from Artificial Analysis
Can I run Claude Mythos 5.2 locally?
No. Anthropic does not publish the weights.
Stated by Anthropic
- Open weights
- no
- License
- n/a
- Parameters
- n/a
- active per token
- n/a
Where can I use Claude Mythos 5.2?
Through the API. Subscription access is not documented in the available plan data.
Through the API
$8 input, $40 output per 1M tokens.
Sources and data date
| Type | Evidence and data date |
|---|---|
| Price | Base API prices without caching or batch discounts. Higher context tiers and other rates are listed under Costs. |
| Input | Documented modalities. Retrieved November 12, 2026. |
| Output | Documented modalities. Retrieved November 12, 2026. |
| Additional source | Anthropic: Claude Fable 5.2 and Mythos 5.2 (retrieved November 12, 2026) · Anthropic: Claude Fable 5.2 and Mythos 5.2 · Editorial description reviewed November 12, 2026 |