By using Claude Fable 5.2, you consent to data retention for purposes of monitoring safe and compliant use of AI. Anthropic's data retention policy does not allow zero data retention. Learn more

Amazon Bedrock endpoint is BYOK-only while we work on enabling public access.

Favicon for anthropic

Anthropic: Claude Fable 5.2 (batch)

anthropic/claude-fable-5.2:batch

Claude Fable 5.2 is Anthropic's most capable model for the most demanding technical work, with gains over Fable 5.1 in coding, reasoning, and vision. In prerelease testing it completed otherwise-infeasible software migrations, designed working electronic devices from scratch, and made progress on open problems in physics and mathematics. It communicates more clearly than earlier Fable models and generates output up to 30% faster than Fable 5.1. Adaptive extended thinking is always on, with reasoning effort levels from low to max (default high) and preserved thinking across turns. Anthropic recommends Opus 5.5 as the daily driver for most coding and knowledge work, with Fable 5.2 for the most ambitious, open-ended problems.

Modalities
In / out price
$4 / $20per 1M
Context
1.0M
Released
Nov 9, 2026

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick: Balanced (price + speed), Nitro (fastest), or Floor (cheapest).

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Weighted average

Input
$0/M tokens
Output
$0/M tokens
Price history
No effective price data for this selection

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

AutoExacto benchmarks
GPQA DiamondTAU-BenchAnthropic95.1%71.3%Azure94.9%68.0%Google94.6%68.0%

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Not enough uptime data to display yet.

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

Benchmarks

Scores on standardized evaluations and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Benchmark score summary for Anthropic: Claude Fable 5.2 (batch) (Artificial Analysis, Design Arena and Vals AI)
SourceBenchmarkScore
Artificial AnalysisClaude Fable 5.2 (Max, Default Fallback) Intelligence Index64.6
Artificial AnalysisClaude Fable 5.2 (Max, Default Fallback) HLE74.3%
Artificial AnalysisClaude Fable 5.2 (Max, Default Fallback) AA-LCR83.3%
Artificial AnalysisClaude Fable 5.2 (Max, Default Fallback) GDPval-AA66.6%
Artificial AnalysisClaude Fable 5.2 (Max, Default Fallback) CritPt35.4%
Artificial AnalysisClaude Fable 5.2 (Max, Default Fallback) SciCode67.7%
Artificial AnalysisClaude Fable 5.2 (Max, Default Fallback) AA-Omniscience Accuracy79.1%
Artificial AnalysisClaude Fable 5.2 (Max, Default Fallback) AA-Omniscience Non-Hallucination Rate40.7%
Design ArenaClaude Fable 5.2 Agents Arena Full Stack Elo1404
Design ArenaClaude Fable 5.2 Agents Arena Mobile Apps Elo1326
Design ArenaClaude Fable 5.2 Agents Arena Pdf Elo1319
Design ArenaClaude Fable 5.2 Agents Arena Spreadsheet Elo1434
Design ArenaClaude Fable 5.2 Models Arena 3D Elo1505
Design ArenaClaude Fable 5.2 Models Arena Code Categories Elo1373
Design ArenaClaude Fable 5.2 Models Arena Game Development Elo1396
Design ArenaClaude Fable 5.2 Models Arena UI Component Elo1374
Design ArenaClaude Fable 5.2 Models Arena Website Elo1351
Vals AIClaude Fable 5.2 BioMysteryBench83.7%
Vals AIClaude Fable 5.2 Code Migration v1.183.3%
Vals AIClaude Fable 5.2 EMB v1.177.4%
Vals AIClaude Fable 5.2 Finance Agent v2.169.5%
Vals AIClaude Fable 5.2 Vals Finance Index63.6%
Vals AIClaude Fable 5.2 HLAB-Vals-1.15.0%
Vals AIClaude Fable 5.2 Immigration74.0%
Vals AIClaude Fable 5.2 Vals Legal Index69.2%
Vals AIClaude Fable 5.2 Legal Research Bench46.2%
Vals AIClaude Fable 5.2 MysteryMechanism51.8%
Vals AIClaude Fable 5.2 ProgramBench19.0%
Vals AIClaude Fable 5.2 ProofBench v1.1100.0%
Vals AIClaude Fable 5.2 Vals RSI Index37.9%
Vals AIClaude Fable 5.2 Vals Science Index63.7%
Vals AIClaude Fable 5.2 SWE-bench Multimodal62.3%
Vals AIClaude Fable 5.2 Tax Agent Bench32.1%
Vals AIClaude Fable 5.2 Terminal-Bench 4.065.2%
Vals AIClaude Fable 5.2 Terminal-Bench-Science55.7%
Vals AIClaude Fable 5.2 Vals Index71.3%
Vals AIClaude Fable 5.2 Vibe Code Bench v1.193.8%

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Not enough data for apps using this model yet.

Activity

Token volume and request traffic to this model over time.

API

Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.

Anthropic: Claude Fable versions

Not currently available through EU in-region routing. In-region routing docs

Frequently asked questions

Explore more models