Claude Mythos 5
Pricing & Specs
Anthropic · $10 input / $50 output per 1M tokens · 1M context window
No longer offered on OpenMark
Claude Mythos 5 is no longer offered on OpenMark (deprecated or superseded upstream). Its specs are kept here for reference. If you're still running it in production, it's worth benchmarking current alternatives: newer models are often cheaper AND better on the same task.
Claude Mythos 5 API Pricing
| Tokens | Price |
|---|---|
| Input | $10 / 1M tokens |
| Output | $50 / 1M tokens |
| Cached input | $1 / 1M tokens |
50% discount available for batch API requests. Cache writes: $12.50/MTok (5min), $20/MTok (1hr). Cache hits & refreshes: $1/MTok.
What that means in practice
Claude Mythos 5 Specs
| Spec | Value |
|---|---|
| Context window | 1M tokens |
| Max output tokens | 128K tokens |
| Input modalities | text, image |
| Output modalities | text |
| Reasoning model | Yes |
| Tool / function calling | Yes |
| JSON mode | Yes |
| Streaming | Yes |
| Prompt caching | Yes |
| Batch API | Yes |
Notes
Limited availability (Project Glasswing). Same capabilities as Fable 5 without safety classifiers. Adaptive thinking always on. Raw thinking content is never returned.
FAQ
How much does Claude Mythos 5 cost?
Claude Mythos 5 costs $10 per 1M input tokens and $50 per 1M output tokens ($1 per 1M cached input tokens).
What is Claude Mythos 5's context window?
Claude Mythos 5 has a 1M-token context window. Maximum output is 128K tokens.
Can I test Claude Mythos 5 on my own task?
Claude Mythos 5 is no longer offered on OpenMark, but you can benchmark its current alternatives from Anthropic and other providers on your own task, free tier available.
Still using Claude Mythos 5?
It's been superseded. Benchmark its current alternatives on your actual
workload. You'll likely find something cheaper AND better. Free tier available.