Claude Mythos 5.1 vs Grok 4.7
Claude Mythos 5.1 from Anthropic and Grok 4.7 from xAI, side by side. Every figure comes from the model registry. No markup on model usage: you pay the provider's list price.
| Attribute |   Claude Mythos 5.1 |  Grok 4.7 |
|---|---|---|
| Provider | Anthropic | xAI |
| Model id | anthropic/claude-mythos-5-1 | xai/grok-4.7 |
| Status | Available via Safeguard | Available via Safeguard |
| Input / 1M tokens | $10 | $2 |
| Output / 1M tokens | $50 | $6 |
| Price notes | Base price, same as Claude Fable 5.1. Anthropic requires the organization to be verified through one of its programs before use. Cache hits $0.25/1M. Batch 50% off. | Prompts <200K tokens. At or above 200K: $4 in / $12 out for the whole request. Cached input $0.50. No batch API. US regional endpoint 1.1x. |
| Context | 1M | 500K |
| Parameters | Not published | Not published |
| Max output | 128,000 tokens | Not published |
| Modality | Text and image | Text and image |
| Weights | Closed | Closed |
| Zero data retention | Not offered | Available |
| Prompts go to | Anthropic (global routing by default) | xAI (SpaceXAI) |
| Retention | Not used for model training without express permission. Claude Mythos 5.1 is a Covered Model that requires 30-day data retention and is not available under ZDR unless Anthropic expressly authorizes it | API requests and responses stored encrypted for 30 days for abuse auditing, then deleted, never used for training without explicit permission |
| Region | Global by default, US-only inference via inference_geo at 1.1x pricing (Claude 4.6 and later) | No region guarantee on the default endpoint, US regional endpoint (grok-4.7 and grok-4.6 only) at 1.1x pricing |
| Price checked | 2026-10-08 | 2026-10-08 |
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