Anthropic · LLM API Modelactive

Claude Mythos 5.1

Claude Mythos 5.1 costs $10.00 per 1M input tokens, $0.25 cached input and $50.00 per 1M output tokens. Batch API: $5.00 input, $25.00 output.

Updated September 21, 2026
Input / 1M
$10.00
Output / 1M
$50.00
Cached Input
$0.25
Context Window
1M
Standard Input
$10.00 / 1M
Base prompt input rate
Standard Output
$50.00 / 1M
Completion output rate
Prompt Caching -90%
$0.25 / 1M
Cached prompt context
Batch API -50%
$5.00 / 1M
Asynchronous batch jobs

Save up to 40% on Anthropic Claude API usage

Connect your AI infrastructure — we'll track prompt caching efficiency and optimize token costs.

Book a demo Connect Anthropic — free

Model pricing

All rates listed in USD per 1 Million (1M) tokens unless noted

Standard
Pricing Metric / Parameter
Standard RATE
(per 1M)
Base input tokens$10 / MTok
5m cache writes$12.50 / MTok
1h cache writes$20 / MTok
Cache hits and refreshes$0.25 / MTok<sup>1</sup>
Output tokens$50 / MTok

Batch processing

All rates listed in USD per 1 Million (1M) tokens unless noted

Standard
Pricing Metric / Parameter
Standard RATE
(per 1M)
Batch input$5 / MTok
Batch output$25 / MTok

Source: Anthropic official pricing page, verified 2026-09-21. Prices in USD per 1M tokens.

AI / LLM
LLM API Cost Comparison

Compare Anthropic Claude costs against OpenAI & Gemini

Use our free LLM Cost Calculator to benchmark Claude Mythos 5.1 token rates, prompt caching savings, and monthly estimated spend side-by-side with leading AI models.

Open LLM Cost Calculator →