Model comparison
Claude Mythos 5 vs Claude Mythos 5.1
Compare Claude Mythos 5 vs Claude Mythos 5.1 API pricing: input/output token costs, cache pricing, context windows, workload estimates, and routing fit.
Claude Mythos 5
anthropic · claude-mythos-5
- Input
- $10
- Output
- $50
- Context
- 1M
Claude Mythos 5.1
anthropic · claude-mythos-5-1
- Input
- $10
- Output
- $50
- Context
- 1M
Quick take
Claude Mythos 5 has the lower input price at $10 per 1M input tokens. Claude Mythos 5 is cheaper for the example blended workload below. Claude Mythos 5 has the larger context window at 1M tokens.
Choose Claude Mythos 5 if...
- Claude Mythos 5 is the better default for cost-sensitive traffic and repeated high-volume calls.
Choose Claude Mythos 5.1 if...
- Claude Mythos 5.1 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 | Claude Mythos 5.1 | Cheaper |
|---|---|---|---|
| 1M input + 200K output | $20.00 | $20.00 | Claude Mythos 5 |
| 10M input + 2M output | $200.00 | $200.00 | Claude Mythos 5 |
| 100M input + 20M output | $2,000.00 | $2,000.00 | Claude Mythos 5 |
Context, output, and capability fit
Claude Mythos 5 provides the larger context window. Check max output separately when the task needs long reports, code generation, or full-document rewrites.
- Claude Mythos 5 max output
- 128K
- Claude Mythos 5.1 max output
- 128K
- Claude Mythos 5 features
- prompt caching, function calling, vision
- Claude Mythos 5.1 features
- prompt caching, function calling, vision
Risk notes for Claude Mythos 5
- High output price: cap max tokens for verbose generation workloads.
Risk notes for Claude Mythos 5.1
- High output price: cap max tokens for verbose generation workloads.
Routing tags
frontierpremiumreasoningcodingagentslong-contextmultimodalcache-friendlymythos-classlimited-availabilityrag