Claude Fable 5 (batch)
Anthropic · Multimodal · Released Jun 2026
Claude Fable 5 is Anthropic's Mythos-class reasoning model, built for autonomous knowledge work and complex coding tasks with support for text, image, and file inputs.
- Strengths
- It delivers the highest reasoning capability across Anthropic's lineup, handling multi-step problems and extended agentic work that earlier models cannot reliably solve.
- Best for
- Deep reasoning tasks, complex software development, long-horizon autonomous workflows, and problems requiring sustained logical inference across many steps.
- Limitations
- It is positioned above Claude Opus 5 in capability and cost; use Sonnet 5 or Opus 4.8 for faster throughput on simpler tasks where maximum reasoning power is not needed.
Input / 1M
$5.00
Output / 1M
$25.00
Cached input / 1M
$0.5
Context window
1M
Also billed
- Cache write
- $6.25 / 1M
Price history
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 28 Jul 2026 | $5.00 | $25.00 | $0.5 | Imported from OpenRouter | openrouter.ai |