Claude Fable 5.1
ReleasedModel Claude Fable 5.1 is a model by Anthropic, released on 1 Sept 2026 (44 days ago).
In the Frontier SetAnthropic positions this model in its top tier — role: Highest capability. “Anthropic's most capable model open to all customers” Source: platform.claude.com · checked on 10 Oct 2026
- Where can it be used?
- Evidenced as usable in: Claude, Claude Code, Claude Enterprise, Claude Team, GitHub Copilot, Langdock, Microsoft 365 Copilot (verified for Cowork only)For 7 more recorded products there is no statement; that does not mean “not available”.Available in the provider’s API
- Did we test it?
- No lab run published yet
- Last change
- 44 days ago
- Evidence
- 8 sources from 5 sitesRegistry entry:
What backs this up?
Three kinds of evidence, kept apart. None of them proves AGI on its own; where one is missing, the page says so.
- In real productsEvidenced as usable in: Claude, Claude Code, Claude Enterprise, Claude Team, GitHub Copilot, Langdock, Microsoft 365 Copilot (verified for Cowork only)
- agi.jetzt PrüfstandNo published run yet.
- Public benchmarks20 reported results on 15 benchmarks — each with its source
A model and the product around it are different things: a result for one does not carry over to the other.
Public benchmark results
Results reported by benchmark maintainers or providers, each with its source. They are not averaged and not compared across benchmarks; a provider result is self-reported. Some sources are data files of the benchmark’s own site rather than pages; they are marked as machine-readable.
- Claude Fable 5.146.2 %Chartography · v1 · accuracy (expert-range graded), no toolssource as of 03/10/2026 · benchmark maintainer · mode not stated · judge: google/gemini-3.5-flash · tools: no · setting: Inspect AI (surge-ai/chartography) · attempts: 10 · web: no · reasoning: Adaptive thinking, max effort · computer use: no · reported as „Claude Fable 5.1 (Adaptive/Max)“Source: surgehq.ai — Chartography, Claude Fable 5.1
- Claude Fable 5.127.6 %GDP.pdf · v1 · pass rate, all criteria (strict)source as of 03/10/2026 · benchmark maintainer · mode not stated · judge: google/gemini-3.5-flash · tools: no · setting: Inspect AI (surge-ai/gdp-pdf) · attempts: 5 · web: no · reasoning: Adaptive thinking, max effort · computer use: no · reported as „Claude Fable 5.1 (Adaptive/Max)“Source: surgehq.ai — GDP.pdf, Claude Fable 5.1
- Claude Fable 5.157.88 %Terminal-Bench · 4.0 · resolution rate (mean of 5 runs)source as of 03/10/2026 · benchmark maintainer · model + harness · Claude Code · tools: yes · attempts: 5 · pass@k: 1 · reasoning: max · reported as „Fable 5.1“Source: www.tbench.ai — Terminal-Bench, Claude Fable 5.1
- Claude Fable 5.1$5,421.56Vending-Bench 2 · 2 · final bank balancesource as of 03/10/2026 · benchmark maintainer · model + harness · Andon Labs Vending-Bench 2 agent environment (email, web search, inventory tools, notes/reminders) · tools: yes · budget: ~1 simulated year; 3000-6000 messages, 60-100M output tokens per run · attempts: 6 · web: yesMachine-readable source: andonlabs.com · data bundle of the website, not linked
- Claude Fable 5.190 %ARC-AGI-2 · semi-private · accuracy (task pass rate)source as of 02/10/2026 · benchmark maintainer · mode not stated · reasoning: max · reported as „Claude Fable 5.1 (Max)“Machine-readable source: arcprize.org · JSON — ARC-AGI-2, Claude Fable 5.1
- Claude Fable 5.150.9 %FrontierCode · 1.1-main · overall score (mergeability)source as of 29/09/2026 · benchmark maintainer · mode not stated · judge: model-graded rubric checks (grader not named on leaderboard) · tools: yes · web: yesSource: cognition.com — FrontierCode, Claude Fable 5.1
- Claude Fable 5.160.6 %BenchCAD Vision2Code · v1 · voxel IoU, no toolssource as of 22/09/2026 · self-reported by the provider · mode not stated · tools: no · setting: Anthropic internal; random 1,000-file subset of 17,900 Vision2Code files; 256x256 px views (corrected) · attempts: 5 · reasoning: adaptive thinking, max effortSource: www-cdn.anthropic.com · PDF — BenchCAD Vision2Code, Claude Fable 5.1
- Claude Fable 5.192.6 %BenchCAD Vision2Code · v1 · voxel IoU, with toolssource as of 22/09/2026 · self-reported by the provider · mode not stated · tools: yes · setting: Anthropic internal; random 1,000-file subset of 17,900 Vision2Code files; 256x256 px views (corrected) · attempts: 5 · reasoning: adaptive thinking, max effortSource: www-cdn.anthropic.com · PDF — BenchCAD Vision2Code, Claude Fable 5.1
- Claude Fable 5.188.4 %Chartography · v1 · accuracy (expert-range graded), with toolssource as of 22/09/2026 · self-reported by the provider · mode not stated · judge: Gemini 3.5 Flash · tools: yes · setting: Anthropic internal implementation of Chartography · attempts: 5 · web: no · reasoning: adaptive thinking, max effort · computer use: noSource: www-cdn.anthropic.com · PDF — Chartography, Claude Fable 5.1
- Claude Fable 5.150.7 %HLE-Diamond · 2026-09-22 · accuracysource as of 22/09/2026 · benchmark maintainer · model alone · web: no · reasoning: highSource: lastexam.ai — HLE-Diamond, Claude Fable 5.1
- Claude Fable 5.153.7 %HLE-Diamond · 2026-09-22 · accuracysource as of 22/09/2026 · benchmark maintainer · model alone · web: no · reasoning: maxSource: lastexam.ai — HLE-Diamond, Claude Fable 5.1
- Claude Fable 5.160.8 %HLE-Diamond · 2026-09-22 · accuracy · reasoning halfsource as of 22/09/2026 · benchmark maintainer · model alone · subset: reasoning partition (500 questions) · web: no · reasoning: highSource: lastexam.ai — HLE-Diamond, Claude Fable 5.1
Show 8 more
- Claude Fable 5.172.3 %HLE-Diamond · 2026-09-22 · accuracy · toolssource as of 22/09/2026 · benchmark maintainer · model + harness · Claude Code 2.1.278 · tools: yes · web: yes · reasoning: highSource: lastexam.ai — HLE-Diamond, Claude Fable 5.1
- Claude Fable 5.180.7 %OSWorld · 2.0-2026-09-10-tasks · partial scoresource as of 22/09/2026 · self-reported by the provider · model + harness · Anthropic computer-use harness with server-side compaction · judge: Claude Opus 4.8 · tools: yes · budget: 500 action steps · attempts: 5 · reasoning: max effort · computer use: yesSource: www-cdn.anthropic.com · PDF — OSWorld, Claude Fable 5.1
- Claude Fable 5.146.5 %Humanity's Last Exam · 2025-04 · accuracyevaluated 03/09/2026 · benchmark maintainer · mode not stated · judge: o3-mini-2025-01-31 · reasoning: xhigh · temperature: 0.0 when configurable · reported as „Fable 5.1 (xhigh)“Source: labs.scale.com — Humanity's Last Exam, Claude Fable 5.1
- Claude Fable 5.186.6 %SimpleBench · avg5 · accuracy (average of 5 runs)evaluated 03/09/2026 · benchmark maintainer · model alone · pass@k: AVG@5 · temperature: 0.7 (top-p 0.95)Machine-readable source: simple-bench.com · JavaScript file — SimpleBench, Claude Fable 5.1
- Claude Fable 5.10 %FrontierMath: Erdős problems · 2026-08 · accuracy (mean score)evaluated 01/09/2026 · benchmark maintainer · model + harness · Epoch deepagent (Inspect) with bash, text editor, budget tool; Lean 4 + Mathlib, SageMath, Python; offline arXiv snapsho · tools: yes · budget: $300 spend and 72 hours working time per problem · attempts: 1 · web: no · reasoning: max · reported as „claude-fable-5-1_max“Machine-readable source: epoch.ai · ZIP download — FrontierMath: Erdős problems, Claude Fable 5.1
- Claude Fable 5.187.8 %FrontierMath Tier 4 · v2 · accuracy (mean score)evaluated 01/09/2026 · benchmark maintainer · mode not stated · tools: yes · budget: 1,000,000 tokens hard limit (forced submission at 660,000) · setting: Epoch AI FrontierMath implementation (Inspect): python tool + submit_answer tool · web: no · reasoning: max · reported as „claude-fable-5-1_max“Machine-readable source: epoch.ai · ZIP download — FrontierMath Tier 4, Claude Fable 5.1
- Claude Fable 5.190.18 %FrontierMath Tiers 1–3 · v2 · accuracy (mean score)evaluated 01/09/2026 · benchmark maintainer · mode not stated · tools: yes · budget: 1,000,000 tokens hard limit (forced submission at 660,000) · setting: Epoch AI FrontierMath implementation (Inspect): python tool + submit_answer tool · web: no · reasoning: max · reported as „claude-fable-5-1_max“Machine-readable source: epoch.ai · ZIP download — FrontierMath Tiers 1–3, Claude Fable 5.1
- Claude Fable 5.154.7 %SWE-bench Multimodal · v1 · resolve ratehistoricalself-reported by the provider · mode not statedSource: www-cdn.anthropic.com · PDF — SWE-bench Multimodal, Claude Fable 5.1
Where can it be used?
Only recorded availability statements are shown. A missing plan or surface means unknown, not unavailable. Where it applies only to a plan or a region, the row says so. “Rolling out” is not “available”. “Rollout reported” means a rollout was reported, but nothing has supported it for more than 90 days.
| Product | Status | since | Checked | Sources |
|---|---|---|---|---|
| ClaudeApp | Limited availability | not documented | checked 11 Oct 2026 | 1support.claude.com |
| ClaudeApp · Max 20x | Limited availability | not documented | checked 11 Oct 2026 | 1support.claude.com |
| ClaudeApp · Max 5x | Limited availability | not documented | checked 11 Oct 2026 | 1support.claude.com |
| ClaudeApp · Pro Credits | Limited availability | not documented | checked 11 Oct 2026 | 1support.claude.com |
| Claude CodeCode | Limited availability | not documented | checked 11 Oct 2026 | 1support.claude.com |
| Claude EnterpriseWork · Enterprise Premium | Limited availability | not documented | checked 11 Oct 2026 | 1support.claude.com |
| Claude EnterpriseWork · Enterprise Standard Credits | Limited availability | not documented | checked 11 Oct 2026 | 1support.claude.com |
| Claude EnterpriseWork · Enterprise Usage | Limited availability | not documented | checked 11 Oct 2026 | 1support.claude.com |
| Claude TeamWork · Team Premium | Limited availability | not documented | checked 11 Oct 2026 | 1support.claude.com |
| Claude TeamWork · Team Standard Credits | Limited availability | not documented | checked 11 Oct 2026 | 1support.claude.com |
| GitHub CopilotCopilot · Business | Limited availability | not documented | checked 11 Oct 2026 | 1docs.github.com |
| GitHub CopilotCopilot · Enterprise | Limited availability | not documented | checked 11 Oct 2026 | 1docs.github.com |
| GitHub CopilotCopilot · Max | Limited availability | not documented | checked 11 Oct 2026 | 1docs.github.com |
| GitHub CopilotCopilot · Pro Plus | Limited availability | not documented | checked 11 Oct 2026 | 1docs.github.com |
| GitHub Copilot | Limited availability | not documented | checked 11 Oct 2026 | 1docs.github.com |
| LangdockWork | Limited availability | not documented | checked 11 Oct 2026 | 1docs.langdock.com |
| Microsoft 365 CopilotCowork | Limited availability | not documented | checked 11 Oct 2026 | 1learn.microsoft.com |
| Claude Enterprise | Unknown | not documented | checked 11 Oct 2026 | 1support.claude.com |
| Claude Team | Unknown | not documented | checked 11 Oct 2026 | 1support.claude.com |
Where a start is “not documented”, a source check found the state in place; the source names no start date.
No statement on record for 7 further products: ChatGPT, ChatGPT Work, Codex, Gemini, Gemini for Google Workspace, Grok, Le Chat Enterprise. No statement is not the same as not available.
Developer APIs
Developer access — not a statement about any work product.
| Product | Status | since | Checked | Sources |
|---|---|---|---|---|
| Claude APIAPI | Available | not documented | checked 3 Oct 2026 | 1platform.claude.com |
What did we test?
No lab run of Claude Fable 5.1 is published yet.
Nothing is shown until a real run exists. See what the lab tests:
Lifecycle and history
The dates the provider confirmed, and every recorded period of availability. A current period shows its checked status; one without a source check is marked not verified.
Announced—not recorded
Released
Deprecated—not recorded
Retired—not recorded
What changed?
Sourced changes concerning this model, newest first.
- 44 days agoadded to the record on 30 Sept 2026
1platform.claude.com
Evidence
Every source document behind the facts on this page, by domain.
| Domain | Docs | Documents |
|---|---|---|
| support.claude.com | 3 | |
| platform.claude.com | 2 | |
| docs.github.com | 1 | |
| docs.langdock.com | 1 | |
| learn.microsoft.com | 1 |