Anthropic
Claude Fable 5.2
Claude Fable 5.2 is Anthropic's 2026-11-09 update to the Fable line: $8/$40 per million tokens, down from $10/$50, with a 1,000,000-token context, 128K maximum output and a June 2026 knowledge cutoff, plus a verification-only Mythos 5.2 sibling at the same specs and price.
Claude Fable 5.2 benchmarks and pricing, every number sourced: no Claude Fable 5.2 benchmark scores tracked yet, priced at $8.00 per million input tokens and $40.00 per million output.
- Released
- 2026-11-09
- License
- proprietary
- Context window
- 1M tokens
- Knowledge cutoff
- 2026-06
- Succeeded
- Claude Fable 5.1 (2026-09-01)
- Parameters
- Not disclosed
- Architecture
- Not disclosed
Claude Fable 5.2 API pricing
$8.00 in / $40.00 out per 1M tokens — official pricing source
What Claude Fable 5.2 costs per job
| Workload | Tokens in / out | Cost |
|---|---|---|
| One long chat turn | 100K / 10K | $1.20 |
| A codebase review | 1,000K / 100K | $12.00 |
| A day of agent work | 10,000K / 1,000K | $120.00 |
Computed from Claude Fable 5.2’s list rates above — cache discounts and batch tiers are not applied.
Claude Fable 5.2 is one of 9 Anthropic models tracked on this site, at these official list prices.
| Model | In / 1M | Out / 1M |
|---|---|---|
| Claude Fable 5.2 | $8.00 | $40.00 |
| Claude Haiku 5.5 | $0.10 | $0.50 |
| Claude Sonnet 5.5 | $2.00 | $10.00 |
| Claude Opus 5.5 | $4.00 | $20.00 |
| Claude Fable 5.1(previous version) | $10.00 | $50.00 |
| Claude Opus 5(previous version) | $5.00 | $25.00 |
| Claude Sonnet 5(previous version) | $2.00 | $10.00 |
| Claude Fable 5(previous version) | $10.00 | $50.00 |
| Claude Opus 4.8(previous version) | $5.00 | $25.00 |
Notes on the record
Launched 2026-11-09 (Anthropic blog dated November 9, 2026; @AnthropicAI post 2026-11-09T19:00:21Z, quoting the @claudeai launch post at 2026-11-09T18:57:59Z). The documented id is `claude-fable-5-2`, with a 1,000,000-token context, 128,000 maximum output tokens, and a June 2026 knowledge cutoff (platform.claude.com/docs/en/models/fable-5-2/overview, checked 2026-11-10).
Pricing is $8 input / $40 output per million tokens, down from Fable 5.1's $10/$50. Cache reads are $0.20 per million tokens and fast mode is $16/$80 (Anthropic pricing table, checked 2026-11-10). Claude 4.6 and later models, except Haiku 5.5, bill the full 1M window at that standard rate. Claude Mythos 5.2 (`claude-mythos-5-2`) has the same specs and pricing but is limited to Anthropic's Life Sciences and Cyber Verification Programs, so it is recorded here rather than as a separate model page.
No tracked independent Fable 5.2 score was on a board this site tracks at the 2026-11-10 scan, so this page adds no score row. Anthropic's launch table, safeguards on and highest-available effort unless noted, lists Humanity's Last Exam with tools at 74.2% and OSWorld 2.1 offline partial at 89.3% for Fable 5.2. Those two Fable 5.2 figures stay claims in this note. The catalog marks Fable 5.1 as the previous version because the lineage rule matches the Claude Fable line and the name, not the sticker price, which fell from $10/$50 to $8/$40. The homepage scores table still lists Fable 5.1, because that table hides a row only once a newer sibling has a sourced score. No lifecycle field is stored.
Compare with
FAQ
What does Claude Fable 5.2 cost?
$8 per million input tokens and $40 per million output tokens, down from Fable 5.1's $10/$50. Cache reads are $0.20 per million tokens and fast mode is $16/$80 (Anthropic pricing, checked 2026-11-10). Fast mode is a speed price, not a long-context step.
What is Claude Mythos 5.2?
It is the verification-program sibling of Fable 5.2, limited to Anthropic's Life Sciences and Cyber Verification Programs, with the same 1M context, 128K output, June 2026 cutoff and $8/$40 pricing. It is documented under `claude-mythos-5-2` but is not a separate model page here.
What are Claude Fable 5.2's context window and knowledge cutoff?
A 1,000,000-token context window and a 128,000-token maximum output, with a June 2026 knowledge cutoff, per Anthropic's Fable 5.2 model overview checked 2026-11-10. Input is text and images. Output is text.
Does Claude Fable 5.2 replace Claude Fable 5.1?
The catalog and this page's version history mark Fable 5.1 as the previous version. Fable 5.2 is newer and in the same Claude Fable line, and the lineage rule reads the name rather than the price, which fell from $10/$50 to $8/$40. Fable 5.1 stays listed. The homepage scores table does not drop it yet, because Fable 5.2 has no sourced score. Anthropic's Fable 5.2 overview does not call it a successor. No lifecycle field is stored.
Has Claude Fable 5.2 been independently benchmarked?
No tracked independent board had a Fable 5.2 row at the 2026-11-10 scan, so this page carries no score. The tracked-board cells from Anthropic's launch table are claims in the notes above, not score rows.
Further reading
- Models with 10M token context windows 2026 — Claude Fable 5.2 is one of the 49 models it compares.
- Self-reported vs. independent AI benchmarks — the self-reported-versus-independent rule every score on Claude Fable 5.2’s page follows.