Claude Mythos 5.1 pricing
Claude Mythos 5.1 costs $10.00 per 1M input tokens and $50.00 per 1M output tokens as of September 2026. Tracked daily since 6 September 2026 across 5 snapshots.
Current rates
- Input: $10.00 per 1M tokens
- Output: $50.00 per 1M tokens
- Cached input: $0.25 per 1M tokens
- Context window: 1,000,000 tokens
No price movement recorded for Claude Mythos 5.1 over the tracked period — the rate has held steady.
Cheaper alternatives to Claude Mythos 5.1
Ranked by blended cost assuming a 3:1 input-to-output ratio, which is typical of chat and agent workloads. Only currently callable models with a comparable context window are listed.
| Model | Input / 1M | Output / 1M | Cheaper by |
|---|---|---|---|
| GPT-5.5 | $5.00 | $30.00 | 44% |
| Claude Opus 5 | $5.00 | $25.00 | 50% |
| Gemini 3.1 Pro | $2.00 | $12.00 | 78% |
| Grok 4.6 | $2.00 | $6.00 | 85% |
| Muse Spark 1.3 | $1.25 | $4.25 | 90% |