Claude Mythos 5.1: token counter & pricing
Anthropic · exact (uses official tokenizer) · pricing as of 2026-09-07.
- Provider
- Anthropic
- API model ID
claude-mythos-5-1- Context window
- 1,000,000 tokens
- Input price
- $10.00 per 1M tokens
- Output price
- $50.00 per 1M tokens
- Tokenizer accuracy
- exact (uses official tokenizer)
- Pricing as of
- 2026-09-07
Open the counter to count tokens for Claude Mythos 5.1 in real time.
Detailed write-up for Claude Mythos 5.1 is coming soon. In the meantime, the live counter at the top of this page works for all supported models.
Compare Claude Mythos 5.1 to other models
- Claude Opus 5 (Anthropic, $5.00/$25.00)
- Claude Opus 5 (Fast Mode) (Anthropic, $10.00/$50.00)
- Claude Sonnet 5 (Anthropic, $2.00/$10.00)
- Claude Haiku 4.5 (Anthropic, $1.00/$5.00)
- Claude Fable 5.1 (Anthropic, $10.00/$50.00)
- Claude Fable 5 (Anthropic, $10.00/$50.00)
- Claude Mythos 5 (Anthropic, $10.00/$50.00)
- GPT-6 Astra (OpenAI, $10.00/$50.00)
- GPT-4 Turbo (OpenAI, $10.00/$30.00)
- GPT-5.5 (OpenAI, $5.00/$30.00)