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Claude Mythos Preview vs Claude Opus 4.7 (Fast)
This page is context-first: how much text each model can take in one request. Full specs adds capabilities and limits; the pricing matrix below is only about $/million tokens from hosts that list both models.
Model
Claude Mythos Preview
Context window
1M
1,000,000 tokens · ~750K words
Model
Claude Opus 4.7 (Fast)
Context window
1M
1,000,000 tokens · ~750K words
Context window · side by side
Bar length is relative to the larger of the two windows (100% = max of this pair). This is not pricing.
Same context window size for both models.
Claude Mythos Preview and Claude Opus 4.7 (Fast) have identical context windows (1000K tokens).
Full specs
Context, output, capabilities, and dates. Green highlights the favorable value where we compute a winner.
| Spec | Claude Mythos Preview | Claude Opus 4.7 (Fast) |
|---|---|---|
| Context window | 1,000,000 tokens (1000K) | 1,000,000 tokens (1000K) |
| Max output tokens | 128,000 tokens (128K) | 128,000 tokens (128K) |
| Speed tier | Balanced | Deep |
| Vision | Yes | Yes |
| Function calling | Yes | Yes |
| Extended thinking | Yes | Yes |
| Prompt caching | No | Yes |
| Batch API | Yes | Yes |
| Release date | N/A | May 2026 |
Pricing matrix
Dollar rates only: hosts that list both models, per 1M tokens. For how much text fits, use the context section above — not this table.
| Provider | Claude Mythos Preview in | Claude Mythos Preview out | Claude Opus 4.7 (Fast) in | Claude Opus 4.7 (Fast) out |
|---|---|---|---|---|
| Aws Bedrock | — | — | — | — |
Frequently asked questions
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