Claude Fable
Anthropic's deepest reasoner — for work where Opus at higher effort falls short.
Claude Fable is the top of Anthropic's lineup: always-on thinking, the longest horizon, the highest price. Anthropic's own guidance is to reach for Fable when Opus at a higher effort setting falls short. It shares the rest of the lineup's shape — the 1M-token context and 128K output window.
What it is good at
- The hardest long-horizon agentic work; Anthropic's pick when Opus at higher effort falls short
- FrontierCode v1.1 at 50.3% — above Opus 5's 48.0% on Anthropic's own table (vendor-reported)
What it is less good at
- The most expensive Claude at $10 in / $50 out per MTok
- Slower than the rest of the lineup (Anthropic's own comparative)
Reaching it with TeamCLI
TeamCLI runs Claude Fable as Claude Fable 5.1:
Ways to reach it
| Route | Spends | Status |
|---|---|---|
| Claude Code | An Anthropic subscription (Claude Pro or Max), or an Anthropic API key. | Verified |
| Cursor | A Cursor plan. | Listed — not yet verified |
| Antigravity | A Google account on a Google AI plan (the Antigravity / Google AI Ultra pools). | Listed — not yet verified |
The seat line
Each route maps to a TeamCLI seat line — the same fields, written generically. No machine paths, no launcher script of anybody's, no team's own seat names.
| Route | cli | vendor | model | version | display | launch |
|---|---|---|---|---|---|---|
| Claude Code | claude-code | anthropic | Claude Fable | 5.1 | Claude Fable 5.1 | claude |
| Cursor | cursor | anthropic | Claude Fable | 5.1 | Claude Fable 5.1 | cursor-agent |
| Antigravity | antigravity | anthropic | Claude Fable | 5.1 | Claude Fable 5.1 | agy |
Versions
One block per version, the current one first, each with its own anchor. The comparison table puts the costs and the family's benchmark columns side by side; the values are verbatim, and every one is sourced and dated in its version's section below and in the Sources list. A dash means the source publishes no figure, and nothing here is estimated.
No independent intelligence or speed index is republished here: Artificial Analysis measures both across labs, and its terms allow the link but not the copy — its figures live on its own pages.
| Version | Released | Context | Input price | Output price | Terminal-Bench 4.0 (agentic coding) | FrontierCode v1.1, Main (agentic coding) | CursorBench 4.0 (agentic coding) | Humanity's Last Exam (multidisciplinary reasoning) |
|---|---|---|---|---|---|---|---|---|
| Claude Fable 5.1 — current | September 1, 2026 | 1M tokens | $10 / MTok | $50 / MTok | 55.8% | 50.3% | 51.8% | 65.6% |
| Claude Fable 5 | — | — | $10 / MTok | $50 / MTok | — | — | — | — |
Claude Fable 5.1 — current
- Model id:
claude-fable-5-1
Abilities
- Released: September 1, 2026 — Anthropic — Claude Fable 5.1 model page (read 2026-10-19).
- Context window: 1M tokens — Anthropic — Claude Fable 5.1 model page (read 2026-10-19).
- Max output: 128K tokens — Anthropic — Claude Fable 5.1 model page (read 2026-10-19).
- Output speed: —
- Latency: Slower (comparative, within Anthropic's lineup) — Anthropic — models overview (read 2026-10-19).
Costs
- Input price: $10 / MTok — Anthropic — pricing (read 2026-10-19). Batch API 50% off; cache reads $0.25
- Output price: $50 / MTok — Anthropic — pricing (read 2026-10-19).
Benchmarks — as reported by the lab
- Terminal-Bench 4.0 (agentic coding) — 55.8% (Anthropic — Claude Opus 5.5 announcement, read 2026-10-19)
- FrontierCode v1.1, Main (agentic coding) — 50.3% (Anthropic — Claude Opus 5.5 announcement, read 2026-10-19)
- CursorBench 4.0 (agentic coding) — 51.8% (Anthropic — Claude Opus 5.5 announcement, read 2026-10-19)
- Humanity's Last Exam (multidisciplinary reasoning) — 65.6% (Anthropic — Claude Opus 5.5 announcement, read 2026-10-19)
This is the version the seat lines above run.
Claude Fable 5
- Model id: —
Abilities
- Released: —
- Context window: —
- Max output: —
- Output speed: —
- Latency: —
Costs
- Input price: $10 / MTok — Anthropic — pricing (read 2026-10-19).
- Output price: $50 / MTok — Anthropic — pricing (read 2026-10-19).
Sources
- Anthropic — Claude Fable 5.1 model page — read 2026-10-19
- Anthropic — pricing — read 2026-10-19
- Anthropic — models overview — read 2026-10-19
- Anthropic — Claude Opus 5.5 announcement — read 2026-10-19
Figures refreshed 2026-10-19; benchmarks are vendor-reported. Prices are per million tokens unless a figure says otherwise.