Anthropic · 2026-11-09 · seismic
Claude Fable 5.2 — Anthropic's new top model, $8/$40 and 30% faster
In short
Claude Fable 5.2 is Anthropic's new top-end model for coding, agents and knowledge work. It scores 69.9% on FrontierSWE v2 against 56.3% for Fable 5.1, costs $8 per million input tokens and $40 per million output tokens, and is up to 30% faster.
Anthropic · 2026-11-09 · 2 sources checked
Anthropic's top-end Claude gets 20% cheaper, up to 30% faster, and jumps on agentic coding and knowledge-work tests.
LIVE · updated 19:45 UTC
What changed vs Claude Fable 5.1
- Faster agentic coding. 69.9% on FrontierSWE v2 against 56.3% for Fable 5.1 and 62.3% for Opus 5.5.
- Cheaper than 5.1. $8 / $40 per million tokens, against $10 / $50 for Fable 5.1, with output up to 30% faster.
- Fewer blocked queries. Cyber and biology classifiers block about 55% fewer queries than on Fable 5.1.
Claude Fable 5.1 vs Claude Fable 5.2
| Claude Fable 5.1 | Claude Fable 5.2 | |
|---|---|---|
| Released | 2026-09-01 | 2026-11-09 |
| Price in / out (1M) | $10.00 / $50.00 | $8.00 / $40.00 |
| Context window | 1M | 1M |
| Max output | 128K | 128K |
| AutomationBench (business workflows) | 31.4% | 51.4% |
| Inputs | Text, Vision | Text, Vision |
| License | Proprietary | Proprietary |
Live updates
- Specs confirmed in Anthropic's model docs: 1M-token context, 128K max output, text + image input, adaptive thinking always on, knowledge cutoff June 2026. platform.claude.com
- Explainer published: what it is, who gets it, how it compares.
Quick facts
| Maker | Anthropic |
|---|---|
| Released | 9 November 2026 |
| API model ID | claude-fable-5-2 |
| Context window | 1M tokens · up to 128K output |
| Input | Text and images |
| Knowledge cutoff | June 2026 |
| Price | $8 input / $40 output per 1M tokens |
| Fast mode | $16 / $80 per 1M tokens, up to 2.5x faster output |
| Mythos 5.2 access | Vetted cyber and life-sciences organizations only |
| Availability | Claude apps, API, AWS, Google Cloud, Microsoft Azure |
Benchmarks
| Claude Fable 5.2 | 69.9% | |
|---|---|---|
| Claude Opus 5.5 | 62.3% | |
| Claude Fable 5.1 | 56.3% |
| Claude Fable 5.2 | 41.3% | |
|---|---|---|
| Claude Opus 5.5 | 21.3% | |
| Claude Fable 5.1 | 17.9% |
| Claude Fable 5.2 | 74.2% | |
|---|---|---|
| Claude Opus 5.5 | 67.7% | |
| Claude Fable 5.1 | 65.6% |
| Claude Fable 5.2 | 51.4% | |
|---|---|---|
| Claude Opus 5.5 | 42.5% | |
| Claude Fable 5.1 | 31.4% |
Pricing
| Input | $8.00 / 1M tokens |
|---|---|
| Output | $40.00 / 1M tokens |
| Fast mode input · Up to 2.5x faster output | $16.00 / 1M tokens |
| Fast mode output | $80.00 / 1M tokens |
What is it?
Claude Fable 5.2 is the new generally available model in Anthropic's Mythos class, replacing Fable 5.1. Claude Mythos 5.2 is the same underlying model with lighter safeguards, open only to vetted cybersecurity and biomedical organizations. The API model ID is claude-fable-5-2, and it runs on AWS, Google Cloud and Microsoft Azure.
How does it work?
Anthropic reports large gains over Fable 5.1 on agentic tests: FrontierSWE v2 rises from 56.3% to 69.9% and Remote Labor Index from 17.9% to 41.3%. Output is up to 30% faster, and an optional fast mode raises generation speed up to 2.5 times at double the price. Classifiers for cyber and biology now block about 55% fewer queries.
Why does it matter?
Teams on Fable 5.1 get a faster, more capable model at a lower list price, and fewer false refusals on security and biology work. The Advisor and Orchestrator roles let Fable 5.2 steer cheaper models in multi-agent setups. Anthropic also says new anti-distillation protections cut harvested data by 90% to 99%.
Who is it for?
teams running agentic coding, research and knowledge-work jobs
Frequently asked questions
- How much does Claude Fable 5.2 cost compared with Fable 5.1?
- Claude Fable 5.2 costs $8 per million input tokens and $40 per million output tokens. Anthropic's published rates for Fable 5.1 were $10 and $50, so the standard price is 20% lower. An optional fast mode costs $16 and $80 per million tokens and speeds up token generation by up to 2.5 times.
- Who can use Claude Mythos 5.2?
- Claude Mythos 5.2 is the same underlying model as Claude Fable 5.2, with lighter cyber and biology safeguards. Anthropic offers it only to vetted organizations through its Cyber Verification Program and Life Sciences Verification Program. Claude Enterprise customers can also use Claude Security, which runs on Mythos 5.2, without joining the cyber program.
- Does Claude Fable 5.2 block fewer requests than Fable 5.1?
- Anthropic says the cyber and biology classifiers on Claude Fable 5.2 block about 55% fewer queries than on Fable 5.1: about 60% fewer in cyber and 40% fewer in biology. Blocked cyber queries fall back to Claude Opus 4.8, and blocked biology queries fall back to Claude Opus 5.
- Should I use Claude Fable 5.2 or Claude Opus 5.5?
- Anthropic recommends starting most coding and knowledge tasks on Claude Opus 5.5, then moving up to Claude Fable 5.2 or Mythos 5.2 for the hardest work, or down to Sonnet 5.5 or Haiku 5.5 to save cost. Fable 5.2 can also act as an Advisor or an Orchestrator alongside other Claude models.
- What is Claude Fable 5.2's context window?
- Claude Fable 5.2 has a 1M-token context window and up to 128K output tokens, takes text and image input, and has a June 2026 knowledge cutoff, per Anthropic's model documentation.
Try it
Model id claude-fable-5-2 on the Claude API