Claude Mythos 5vsClaude Mythos 5.1
Both language models, compared at each maker’s own API list prices. Every figure links to its source.
Compare at your usage
Every model priced for the same request8,000 tokens in, 2,000 out
| Claude Mythos 5 on Claude API | Claude Mythos 5.1 on Claude API | |
|---|---|---|
| Rate applied | Base rate | Base rate |
| Inputper 1M tokens | $10.00 | $10.00 |
| Cache readper 1M tokens | $1.00 | $0.25 |
| Outputper 1M tokens | $50.00 | $50.00 |
| Cost per request | $0.18 | $0.18 |
| Per 1,000 requests | $180.00 | $180.00 |
- Claude Mythos 5 Claude API pricing · as of Nov 1, 2026
- Claude Mythos 5.1 Claude API pricing · as of Nov 1, 2026
Every model is priced for the same request at its maker’s own list prices (each with its source and date), so bold marks the cheapest. A model that can’t serve the request is named, not ranked; a condition its seller doesn’t price says which rate was used.
Cost per request as prompts grow
2K tokens out, list price on each maker’s API.
- Claude Mythos 5 · Claude API
- Claude Mythos 5.1 · Claude API
Key differences
These differences use verified vendor specifications or each maker’s official API on the same region, currency, meter and billing conditions. Different conditions remain side by side in the full table; they do not establish which model is cheaper. Declared features describe support, not measured quality or a recommendation. Missing evidence does not mean a feature is unsupported.
Full comparison
| Claude Mythos 5 Anthropic | Claude Mythos 5.1 Anthropic | |
|---|---|---|
| Overview | ||
| Released | Jun 9, 2026 | Sep 1, 2026 |
| Knowledge cutoff | Jan 2026 | Jun 2026 |
| Specs | ||
| Context | 1M | 1M |
| Max output | 128K | 128K |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Reasoning | ||
| Reasoning efforts | Not stated | high |
| Tool use | ||
| Structured output | ||
| Pricing · per 1M tokens | ||
| Input price | $10.00 | $10.00 |
| Output price | $50.00 | $50.00 |
| Cache read price | $1.00 | $0.25 |
| Cache write price | $12.505-minute cache | $12.505-minute cache |
| Cache write price (1-hour cache) | $20.001-hour cache | $20.001-hour cache |
| Blended price (3 input : 1 output) | $20.00 | $20.00 |
| Pricing under conditions · per 1M tokens | ||
| Batch input price | $5.00Batch | $5.00Batch |
| Batch output price | $25.00Batch | $25.00Batch |
Headline prices may come from different channels, regions or tiers. Check each source before choosing a model; missing facts stay blank.
Model details and sources
- Claude Mythos 5 → Available
- Claude Mythos 5.1 → Available