Models & pricingSpecialized models
Claude Mythos 5Invite only
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 offered separately, by invitation only, for defensive cybersecurity workflows as part of Project Glasswing. It shares Claude Fable 5’s specifications and pricing. Claude Fable 5 includes safety classifiers that can decline requests; Claude Mythos 5 does not include these classifiers. For access, contact your Anthropic, AWS, or Google Cloud account team.
See Claude Fable 5How it compares
| Model | Context | Max output | Price / MTok | Latency | Thinking | Default effort | Knowledge cutoff |
|---|---|---|---|---|---|---|---|
| Claude Fable 5 | 1M | 128K | $10 / $50 | Slower | Adaptive (always on) | high | Jan 2026 |
| Claude Mythos 5This model | 1M | 128K | $10 / $50 | Slower | Adaptive (always on) | high | Jan 2026 |
| Claude Opus 5 | 1M | 128K | $5 / $25 | Moderate | Adaptive | high | May 2026 |
| Claude Sonnet 5 | 1M | 128K | $2 / $10 | Fast | Adaptive | high | Jan 2026 |
| Claude Haiku 4.5 | 200K | 64K | $1 / $5 | Fastest | Extended | — | Feb 2025 |
Specifications
Model IDs
- Claude API
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
- Full price list
- Pricing
Capabilities
- Context window
- 1M tokens
- Max output
- 128K tokens
- Thinking
- Adaptive (always on)
- Default effort
high- Comparative latency
- Slower
- Input → output
- Text and images → text
- Reliable knowledge cutoff
- Jan 2026
- Training data cutoff
- Jan 2026
Availability
- Status
- Active (invite only)
- Released
- June 9, 2026
- Retirement
- Not sooner than June 9, 2027
- Platforms
- Claude APIAmazon BedrockGoogle CloudMicrosoft Foundry
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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