Models & pricingSpecialized models
Claude Mythos 5Verification required
Most capable model for cybersecurity and biology research
- Context window
- 1Mtokens
- Max output
- 128Ktokens
- Input pricing
- $10/ MTok
- Output pricing
- $50/ MTok
Claude Mythos 5 is available only to organizations verified through Anthropic’s verification programs, such as the Cyber Verification Program(opens in new tab). It has the same specifications and pricing as Claude Fable 5. To request access, apply to the program that covers your use case.
See Claude Fable 5How it compares
| Model | Context | Max output | Price / MTok | Thinking | Default effort | Knowledge cutoff |
|---|---|---|---|---|---|---|
| Claude Fable 5.1 | 1M | 128K | $10 / $50 | Adaptive (always on) | high | Jun 2026 |
| Claude Mythos 5This model | 1M | 128K | $10 / $50 | Adaptive (always on) | high | Jan 2026 |
| Claude Opus 5.5 | 1M | 128K | $4 / $20 | Adaptive (always on) | medium | Jun 2026 |
| Claude Sonnet 5.5 | 1M | 128K | $2 / $10 | Adaptive | high | Jun 2026 |
| Claude Haiku 5.5 | 1M | 128K | From $0.10 / $0.50 | Adaptive | medium | Jun 2026 |
Specifications
Model IDs
Pricing
- Input
- $10 / MTok
- Output
- $50 / MTok
- 5m cache write
- $12.50 / MTok
- 1h cache write
- $20 / MTok
- Cache read
- $1 / MTok
- Batch API
- 50% discount on input and output
Capabilities
- Context window
- 1M tokens
- Max output
- 128K tokens
- Thinking
- Adaptive (always on)
- Default effort
high- Input → output
- Text and images → text
- Reliable knowledge cutoff
- Jan 2026
- Training data cutoff
- Jan 2026
Availability
- Status
- Active (verification required)
- Released
- June 9, 2026
- Retirement
- Not sooner than June 9, 2027
- Platforms
- Claude APIAmazon BedrockGoogle CloudMicrosoft Foundry
Resources
What changes when moving from Claude Mythos 5 to Claude Mythos 5.1.
The current Mythos model: overview, specs, and resources.
Reference
Safety evaluations and deployment decisions for Claude Fable 5 and Claude Mythos 5.
Full price list, including batch discounts and prompt caching rates.
How model IDs, aliases, and pinned snapshots work.
Lifecycle status and retirement commitments for every Claude model.
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