Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback)
★ featuredTop 5 cheapest providers (Adjusted $/task)
Within the active global provider, residency and confidentiality filters.
| # | Provider | Platform | Raw input $/1M | Raw output $/1M | Adjusted $/task |
|---|---|---|---|---|---|
| 1 | Amazon Bedrock | OpenRouter | $10.00 | $50.00 | |
| 2 | Anthropic | OpenRouter | $10.00 | $50.00 | |
| 3 | OpenRouter | $10.00 | $50.00 | ||
| 4 | Azure | OpenRouter | $10.00 | $50.00 | |
| 5 | AWS Bedrock | AWS Bedrock | $10.00 | $50.00 |
Benchmarks
MODEL EVIDENCE
Benchmark sheet
14 / 73 registered benchmark versions covered · 16 observations including existing index snapshots.
Composite retains Coding Agent v1.4 · source 2026-09-09
The five Composite inputs remain unchanged. Its Coding Agent input is the median across complete harness results in the retained v1.4 snapshot from 2026-09-09. Artificial Analysis now publishes v1.5, with different components. Explore current v1.5 separately. Dated snapshot labels on other indices identify unversioned source captures, not a verified semantic version.
Profile signals
1 threshold-crossing signal flagged · 15 eligible benchmark families
How flags are calculated
Heuristic screen, not statistical significance: benchmark families are correlated and source uncertainty is unknown. Peer evidence needs ≥ 20 independently measured matched configurations from ≥ 10 distinct model families. A flag needs a directed population z-score of magnitude ≥ 1.5 and a gap of ≥ 1.5 from the leave-one-benchmark-family-out mean z in the same direction, over ≥ 5 other benchmark families.
- unusually strong CritPt (AA) snapshot-2026-09-10
Why
Observed: 0.31143 fractionPeer mean 0.03942 · peer sd 0.0762 · n 521 · families 367Directed z 3.57 · baseline z 1.78 · gap 1.789 · profile n 140.31143 fractionmeasuredobserved 2026-09-10artificialanalysis.ai ↗Evidence
Axis: CritPt (AA) · snapshot-2026-09-10 · Published boardExact value:0.311428571428571fractionObserved: 2026-09-10T21:47:16.627Z · publication date: not recordedObservation id:aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:critpt
Protocol-compatible measured/vendor divergences
No verified protocol-compatible vendor/measured pair is available for this model; agreement cannot be assessed.
Agentic
| Benchmark / version | Evaluation group | Score / provenance |
|---|---|---|
| AA-Briefcase Version snapshot-2026-09-10 | Published board Tests multi-week professional knowledge-work projects with linked tasks and large source collections. | 1650.01 Elomeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: AA-Briefcase · snapshot-2026-09-10 · Published board Exact value: 1650.01 EloObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:briefcaseBreakdown.overall.elo |
| GDPval-AA v2 Version 2 | Published board Tests professional knowledge-work deliverables across occupations using AA's Stirrup harness. | 1745.29 Elomeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: GDPval-AA v2 · 2 · Published board Exact value: 1745.29 EloObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:gdpval |
| Harvey LAB-AA Version snapshot-2026-09-10 | Published board Tests legal-work deliverables across practice areas on Harvey's private task set. | 0.9327 fractionmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: Harvey LAB-AA · snapshot-2026-09-10 · Published board Exact value: 0.932696482848459 fractionObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:harveyLab |
| Terminal-Bench v2.1 (AA) Version 2.1 | Published board Tests terminal-based work on the 89-task verified refresh using Terminus 2. | 0.91011 fractionmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: Terminal-Bench v2.1 (AA) · 2.1 · Published board Exact value: 0.910112359550562 fractionObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:terminalbenchV21 |
| Terminal-Bench v4.0 (AA) Version 4.0 | Published board Tests terminal-based work on the 66-task release using mini-SWE-agent v2.4.6. | 0.55051 fractionmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: Terminal-Bench v4.0 (AA) · 4.0 · Published board Exact value: 0.55050505050505 fractionObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:terminalbenchV40 |
Coding
| Benchmark / version | Evaluation group | Score / provenance |
|---|---|---|
| SciCode (AA subproblems) Version 1.0.1 | Published board Tests scientific Python programming with scientist-annotated background information. | 0.6088 fractionmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: SciCode (AA subproblems) · 1.0.1 · Published board Exact value: 0.608796296296296 fractionObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:scicode |
| AA Coding Index Version snapshot-2026-09-10 (unversioned) | Published board Published AA index from the retained API snapshot. No verified semantic version was supplied. | 80.7 pointsmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: AA Coding Index · snapshot-2026-09-10 (unversioned) · Published board Exact value: 80.7 pointsObserved: 2026-09-10 · publication date: not recorded Observation id: legacy:aa_coding_index:claude-fable-5.1::xhighProtocol: inspect · file data/raw/artificialanalysis.json |
Knowledge
| Benchmark / version | Evaluation group | Score / provenance |
|---|---|---|
| Humanity's Last Exam (AA text-only) Version snapshot-2026-09-10 | Published board Tests expert-level knowledge on AA's text-only Humanity's Last Exam subset. | 0.58712 fractionmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: Humanity's Last Exam (AA text-only) · snapshot-2026-09-10 · Published board Exact value: 0.587117701575533 fractionObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:hle |
| AA-Omniscience Index Version snapshot-2026-09-10 | Published board Tests factual reliability while rewarding correct answers and penalizing hallucinations. | 42.38333 pointsmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: AA-Omniscience Index · snapshot-2026-09-10 · Published board Exact value: 42.3833333333333 pointsObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:omniscience |
Long-context
| Benchmark / version | Evaluation group | Score / provenance |
|---|---|---|
| GDP.pdf (AA) Version snapshot-2026-09-10 | Published board Tests professional reasoning over long PDFs with AA document preparation and grading. | 0.262 fractionmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: GDP.pdf (AA) · snapshot-2026-09-10 · Published board Exact value: 0.262 fractionObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:gdpPdfAllPass |
| AA-LCR v1.1 Version 1.1 | Published board Tests reasoning across multiple long documents with corrected answer keys and grading. | 0.83 fractionmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: AA-LCR v1.1 · 1.1 · Published board Exact value: 0.83 fractionObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:lcr |
Reasoning
| Benchmark / version | Evaluation group | Score / provenance |
|---|---|---|
| AA Intelligence Index Version snapshot-2026-09-10 (unversioned) | Published board Published AA index from the retained API snapshot. No verified semantic version was supplied. | 53.2 pointsmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: AA Intelligence Index · snapshot-2026-09-10 (unversioned) · Published board Exact value: 53.2 pointsObserved: 2026-09-10 · publication date: not recorded Observation id: legacy:aa_intelligence_index:claude-fable-5.1::xhighProtocol: inspect · file data/raw/artificialanalysis.json |
Science
| Benchmark / version | Evaluation group | Score / provenance |
|---|---|---|
| CritPt (AA) Version snapshot-2026-09-10 | Published board Tests research-level physics reasoning with Python, symbolic and numerical answers. | 0.31143 fractionmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: CritPt (AA) · snapshot-2026-09-10 · Published board Exact value: 0.311428571428571 fractionObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:critpt |
| GPQA Diamond (AA) Version snapshot-2026-09-10 | Published board Tests graduate-level biology, physics and chemistry knowledge on the Diamond subset. | 0.93434 fractionmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: GPQA Diamond (AA) · snapshot-2026-09-10 · Published board Exact value: 0.934343434343434 fractionObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:gpqa |
Tool-use
| Benchmark / version | Evaluation group | Score / provenance |
|---|---|---|
| AutomationBench-AA Version 1.0.6 | Published board Tests multi-app SaaS workflows through REST tools on a held-out AutomationBench split. | 0.57772 fractionmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: AutomationBench-AA · 1.0.6 · Published board Exact value: 0.57772425084896 fractionObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:automationBenchPartialScore |
| τ³-Banking (AA) Version 1.0.1 | Published board Tests banking support agents that retrieve policies and change account state through tools. | 0.45773 fractionmeasuredobserved 2026-09-10artificialanalysis.ai ↗ EvidenceAxis: τ³-Banking (AA) · 1.0.1 · Published board Exact value: 0.457731958762887 fractionObserved: 2026-09-10T21:47:16.627Z · publication date: not recorded Observation id: aa:9b166bf3-42db-4f63-8338-1c4a1244ffe8:tauBanking |
Missing coverage · 61 benchmark versions
No result does not mean a zero, or that the model was never tested. Collection failures and disputed versions retain their distinct status.
- AIME 2025 (AA) · 2025
Unknown: no published result matched to this configuration.
- AA-AnalystAgent · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- APEX-Agents-AA · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- Artificial Analysis Coding Agent Index v1.4 · 1.4
Unknown: no published result matched to this configuration.
- Artificial Analysis Coding Agent Index v1.5 · 1.5
Unknown: no published result matched to this configuration.
- EnterpriseOps-Gym-AA · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- IFBench (AA single-turn) · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- ITBench-AA · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- LiveCodeBench (AA historical field) · snapshot-2026-09-10
contested: Exact evaluation task window is unknown.
- MLCR-AA · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- MMMU Pro (AA) · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- τ²-Bench Telecom (AA) · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- Terminal-Bench Hard (AA) · 74221fb
Unknown: no published result matched to this configuration.
- Aider Polyglot · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- ARC-AGI-1 · 1
Unknown: no published result matched to this configuration.
- ARC-AGI-2 · 2
Unknown: no published result matched to this configuration.
- ARC-AGI-3 · 3
Unknown: no published result matched to this configuration.
- BuzzBench · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- CritPt · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- EQ-Bench 4 · 4
Unknown: no published result matched to this configuration.
- EQ-Bench Creative Writing v3 · 3
Unknown: no published result matched to this configuration.
- Judgemark v4 · 4
Unknown: no published result matched to this configuration.
- EQ-Bench Longform Creative Writing · v1.11
Unknown: no published result matched to this configuration.
- Slop Score · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- HELMET · snapshot-2026-09-10
manual required: Suite uses heterogeneous task/context metrics; no universal headline is published.
- Humanity's Last Exam (HLE) · snapshot-2026-09-10
manual required: README sample output is not attributable to a model and is not a current result.
- IFBench · snapshot-2026-09-10
manual required: Captured README specifies evaluation, not a named-model result.
- Japanese-RP-Bench (Aratako) · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- Japanese-RP-Bench v2 (tegnike fork) · 2
Unknown: no published result matched to this configuration.
- LiveBench · 2026-06-25
Unknown: no published result matched to this configuration.
- LongBench v2 · 2
Unknown: no published result matched to this configuration.
- LLM Creative Story-Writing Benchmark · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- LLM Divergent Thinking Creativity Benchmark · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- Elimination Game Benchmark · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- MMMU · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- OTIS Mock AIME 2024-2025 · 2024-2025
contested: Captured July-2025 result predates the registered exact-match grading protocol; withheld.
- PingPong English (unadjusted mean) · 2
Unknown: no published result matched to this configuration.
- RP-Bench Community Elo · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- RULER · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- SciCode · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- SimpleBench · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- The Slop Index · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- SlopBench · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- Spiral-Bench · 1.2
Unknown: no published result matched to this configuration.
- SWE-bench Multilingual · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- SWE-bench Multimodal · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- SWE-Bench Pro Public · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- SWE-bench Verified · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- τ²-bench · 2
Unknown: no published result matched to this configuration.
- τ³-Banking · 1.0.1
Unknown: no published result matched to this configuration.
- τ³-Voice · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- Terminal-Bench · 4.0
Unknown: no published result matched to this configuration.
- Towards AI Editorial Writing · snapshot-2026-09-10
manual required: Private protocol and visually reported X values require xplainervideo capture and primary evidence review.
- UGI NatInt · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- UGI Willingness · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- UGI Writing · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- UGI · snapshot-2026-09-10
Unknown: no published result matched to this configuration.
- Vending-Bench 2 · 2
Unknown: no published result matched to this configuration.
- WeirdML · 2
Unknown: no published result matched to this configuration.
- DesignArena Frontend · snapshot-2026-09-10 (unversioned)
Unknown: no published result matched to this configuration.
- DesignArena Full-Stack · snapshot-2026-09-10 (unversioned)
Unknown: no published result matched to this configuration.
Variants / reasoning settings
| Variant | Coding · snapshot 2026-09-10 | Intelligence · snapshot 2026-09-10 |
|---|---|---|
| Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback) | 81.6 | 53.4 |
| Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback) | 80.7 | 53.2 |
| Claude Fable 5.1 (Adaptive Reasoning, High Effort, Default Fallback) | 79.1 | 51.2 |
| Claude Fable 5.1 (Adaptive Reasoning, Medium Effort, Default Fallback) | 77.1 | 49.1 |
| Claude Fable 5.1 (Adaptive Reasoning, Low Effort, Default Fallback) | 75.2 | 47.0 |
GitHub Copilot
Current usage-based billing · model token cost is converted to AI Credits at 1 credit = $0.01.
Token offers by platform — Adjusted $/task
Adjusted costs are modeled USD per task: AA output tokens × OpenRouter usage I/O (Chutes global fallback). These are general usage and benchmark proxies for coding-agent work. Missing AA data assumes 1,000 output tokens/task; unknown cache hit assumes 0%; unmeasured additional cache writes assume 0 tokens. Click any underlined price for exact inputs, dates and assumptions. Raw list prices use the selected fixed input/output blend, in USD per million tokens.
8 offers within the active global filters; “—” means the catalog is active but no public token price is available.
OpenRouter (4)
| Amazon Bedrock | globalamazon-bedrock | $10.00 raw in $/1M | $50.00 raw out $/1M | |
| Anthropic | globalanthropic | $10.00 raw in $/1M | $50.00 raw out $/1M | |
| globalgoogle-vertex/global | $10.00 raw in $/1M | $50.00 raw out $/1M | ||
| Azure | globalazure | $10.00 raw in $/1M | $50.00 raw out $/1M |
AWS Bedrock (1)
| AWS Bedrock | global | $10.00 raw in $/1M | $50.00 raw out $/1M |
Google Vertex AI (2)
| Google Vertex AI | global | $10.00 raw in $/1M | $50.00 raw out $/1M | |
| Google Vertex AI | euEU | $11.00 raw in $/1M | $55.00 raw out $/1M |
Anthropic (1)
| Anthropic | global | $10.00 raw in $/1M | $50.00 raw out $/1M |