Models & pricingSpecialized models
Claude Mythos 5.1Verification required
Claude Fable 5.1 for verified organizations
- Context window
- 1Mtokens
- Max output
- 128Ktokens
- Input pricing
- $10/ MTok
- Output pricing
- $50/ MTok
How it compares
| Model | Context | Max output | Price / MTok | Latency | Thinking | Default effort | Knowledge cutoff |
|---|---|---|---|---|---|---|---|
| Claude Fable 5.1 | 1M | 128K | $10 / $50 | Slower | Adaptive (always on) | high | Jun 2026 |
| Claude Mythos 5.1This model | 1M | 128K | $10 / $50 | Slower | Adaptive (always on) | high | Jun 2026 |
| Claude Opus 5.5 | 1M | 128K | $4 / $20 | Moderate | Adaptive (always on) | medium | Jun 2026 |
| Claude Sonnet 5.5 | 1M | 128K | $2 / $10 | Fast | Adaptive | high | Jun 2026 |
| Claude Haiku 5.5 | 1M | 128K | From $0.10 / $0.50 | Fastest | Adaptive | medium | Jun 2026 |
Specifications
Pricing
- Input
- $10 / MTok
- Output
- $50 / MTok
- 5m cache write
- $12.50 / MTok
- 1h cache write
- $20 / MTok
- Cache read
- $0.25 / 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- Comparative latency
- Slower
- Input → output
- Text and images → text
- Reliable knowledge cutoff
- Jun 2026
- Training data cutoff
- Jun 2026
Availability
- Status
- Active (verification required)
- Released
- September 1, 2026
- Retirement
- Not sooner than September 1, 2027
Reference
What changes when you move from Claude Mythos 5.
Safety evaluations and deployment decisions for Claude Fable 5.1 and Claude Mythos 5.1.
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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