Model comparison
Claude Mythos 5.1 vs Grok Build 0.1
Compare Claude Mythos 5.1 vs Grok Build 0.1 API pricing: input/output token costs, cache pricing, context windows, workload estimates, and routing fit.
Claude Mythos 5.1
anthropic · claude-mythos-5-1
- Input
- $10
- Output
- $50
- Context
- 1M
Grok Build 0.1
xai · grok-build-0.1
- Input
- $1
- Output
- $2
- Context
- 256K
Quick take
Grok Build 0.1 has the lower input price at $1 per 1M input tokens. Grok Build 0.1 is cheaper for the example blended workload below. Claude Mythos 5.1 has the larger context window at 1M tokens.
Choose Claude Mythos 5.1 if...
- Claude Mythos 5.1 is safer for long documents, repository analysis, and RAG prompts because it has the larger context window.
- Claude Mythos 5.1 gives more room for long generated answers, reports, or code output.
Choose Grok Build 0.1 if...
- Grok Build 0.1 is the better default for cost-sensitive traffic and repeated high-volume calls.
Example workload cost
Estimates use input tokens plus 20% output tokens. They exclude provider discounts, cache hits, and tool/search surcharges.
| Workload | Claude Mythos 5.1 | Grok Build 0.1 | Cheaper |
|---|---|---|---|
| 1M input + 200K output | $20.00 | $1.40 | Grok Build 0.1 |
| 10M input + 2M output | $200.00 | $14.00 | Grok Build 0.1 |
| 100M input + 20M output | $2,000.00 | $140.00 | Grok Build 0.1 |
Context, output, and capability fit
Claude Mythos 5.1 provides the larger context window. Check max output separately when the task needs long reports, code generation, or full-document rewrites.
- Claude Mythos 5.1 max output
- 128K
- Grok Build 0.1 max output
- n/a
- Claude Mythos 5.1 features
- prompt caching, function calling, vision
- Grok Build 0.1 features
- prompt caching, function calling, vision
Risk notes for Claude Mythos 5.1
- High output price: cap max tokens for verbose generation workloads.
Risk notes for Grok Build 0.1
- No major capability risk is flagged in this snapshot, but provider pages should still be verified before production routing.
Routing tags
frontierpremiumreasoningcodingagentslong-contextmultimodalcache-friendlymythos-classlimited-availabilityragbudget