How much does Claude Mythos 5 cost?

Claude Mythos 5 costs $10 per million input tokens and $50 per million output tokens. The blended average is $30.00 per million tokens.

What is the context window of Claude Mythos 5?

Claude Mythos 5 supports a context window of 1000K tokens (1,000,000 tokens) and can generate up to 128K output tokens per request.

What is Claude Mythos 5 best for?

Claude Mythos 5 is best for: Ceiling capability (limited access). It supports chat, vision, function_calling, code, reasoning capabilities.

Claude Mythos 5

Anthropicflagship

The top-scoring model on the board, and the one almost nobody can call: Mythos 5 is available only through Anthropic's Project Glasswing, succeeding the invitation-only Mythos Preview. Capabilities, pricing, limits, and API behaviour are identical to Claude Fable 5 — $10/$50 per 1M tokens, 1M context, 128K output, always-on thinking with the raw chain of thought never returned, and a 30-day data-retention requirement that rules out zero-retention orgs. Listed here for completeness of the frontier; if you are not in Glasswing, Claude Opus 5 or Fable 5 is the model you can actually buy.

Context Window

tokens

Max Output

128K

tokens

Input Price

$10

per 1M tokens

Output Price

$50

per 1M tokens

Speed

tokens/sec

Released

Jun 2026

2026-06-09

Blended Cost

$30.00

per 1M tokens

Value Score

3.3

quality per $

Capabilities

ChatVisionFunction CallingCode GenerationReasoning

Benchmarks

Quality Index

100

MMLU Pro

92.6

HumanEval (Coding)

98.2

MATH

95.4

Arena ELO

1531

Try in Playground Use via Swfte Connect Anthropic Docs

Compare With

Quality: 91·$45.00/1M

About Claude Mythos 5

Claude Mythos 5 is a flagship AI model by Anthropic, released on June 9, 2026. It supports a context window of 1000K tokens and can generate up to 128K output tokens.

At $10 per million input tokens and $50 per million output tokens, its blended cost of $30.00/1M tokens places it in the premium pricing tier. Its value score of 3.3 reflects the balance of quality and cost.

Using Claude Mythos 5 with Swfte

Access Claude Mythos 5 through Swfte Connect, our unified LLM gateway. Connect gives you a single API for 50+ models, with automatic routing, cost optimization, and fallback handling. You can also try Claude Mythos 5 in our AI Playground before integrating.