Claude Fable 5.2 (Medium, Default Fallback)

By Anthropic · released 2026-11-09 (today) · snapshot 2026-11-09

On the Pareto frontierOn frontier at launch dayproprietary
Intelligence index
56.40
Cost to run the AA index
$3360
Price per 1M tokens (in / out)
$8.00 / $40.0
Better than…

Is Claude Fable 5.2 (Medium, Default Fallback) on the Pareto frontier, and what beats it?

On the Pareto frontier

Yes. Nothing live under $10,000 is both smarter and cheaper to run.

The daily check URL below returns 409 the day that changes.

Open in the picker Daily check URL: 200 on the frontier, 409 once beaten

At a glance

Claude Fable 5.2 (Medium, Default Fallback) today

Context window1000k
Input modalitiesText, Image
0204060$10$20$50$100$200$500$1k$2k$5k$10k$20kCost to run the Artificial Analysis Intelligence Index (USD, log scale)Intelligence IndexAgnes 2.5 Pro Theta (Sapiens AI): intelligence 24.00, $397Beam 1.0 (Reflection): intelligence 17.70, $250Claude 4.5 Haiku (Reasoning) (Anthropic): intelligence 7.40, $541Claude Fable 5.1 (High, Default Fallback) (Anthropic): intelligence 47.20, $6618Claude Fable 5.1 (Low, Default Fallback) (Anthropic): intelligence 38.70, $3886Claude Fable 5.1 (Max, Default Fallback) (Anthropic): intelligence 49.20, $13327Claude Fable 5.1 (Medium, Default Fallback) (Anthropic): intelligence 43.20, $4897Claude Fable 5.1 (Xhigh, Default Fallback) (Anthropic): intelligence 50.00, $10097Claude Haiku 5.5 (High) (Anthropic): intelligence 29.90, $121Claude Haiku 5.5 (Max) (Anthropic): intelligence 36.50, $339Claude Haiku 5.5 (Xhigh) (Anthropic): intelligence 34.60, $193Claude Opus 5 (Max) (Anthropic): intelligence 44.20, $9010Claude Opus 5.5 (High, Default Fallback) (Anthropic): intelligence 51.80, $2716Claude Opus 5.5 (Low, Default Fallback) (Anthropic): intelligence 34.80, $980Claude Opus 5.5 (Max, Default Fallback) (Anthropic): intelligence 59.10, $8910Claude Opus 5.5 (Medium, Default Fallback) (Anthropic): intelligence 48.20, $2031Claude Sonnet 5.5 (High, Default Fallback) (Anthropic): intelligence 41.50, $1268Claude Sonnet 5.5 (Low, Default Fallback) (Anthropic): intelligence 25.60, $499Claude Sonnet 5.5 (Max, Default Fallback) (Anthropic): intelligence 54.50, $7981Claude Sonnet 5.5 (Medium, Default Fallback) (Anthropic): intelligence 30.80, $679Claude Sonnet 5.5 (Xhigh, Default Fallback) (Anthropic): intelligence 49.90, $2903DeepSeek V4 Pro 0813 (Max) (DeepSeek): intelligence 23.10, $1402DeepSeek V4 Pro 0813 (Non-reasoning) (DeepSeek): intelligence 12.60, $771DeepSeek V4.1 Flash 1017 (High) (DeepSeek): intelligence 28.60, $384DeepSeek V4.1 Flash 1017 (Max) (DeepSeek): intelligence 32.60, $521DeepSeek V4.1 Flash 1017 (Non-reasoning) (DeepSeek): intelligence 18.50, $310Gemini 3.1 Flash-Lite (Google): intelligence 6.20, $224Gemini 3.5 Flash-Lite (Google): intelligence 11.70, $654Gemini 3.8 Flash (High) (Google): intelligence 30.80, $5764Gemini 3.8 Flash (Medium) (Google): intelligence 30.10, $4547Gemini 4 Argon (High) (Google): intelligence 50.40, $7620Gemini 4 Carbon (High) (Google): intelligence 60.00, $8240Gemini 4 Carbon (Low) (Google): intelligence 54.20, $5725GLM-5.3 (Low) (Z AI): intelligence 23.10, $1219GLM-5.3 (Max) (Z AI): intelligence 31.70, $3496GLM-5.3-Flash (Z AI): intelligence 27.80, $378GPT-5.6 Luna (Max) (OpenAI): intelligence 23.80, $334GPT-5.6 Terra (Max) (OpenAI): intelligence 32.30, $3250GPT-6 Astra (Low) (OpenAI): intelligence 43.30, $1651GPT-6 Astra (Max) (OpenAI): intelligence 56.90, $5661GPT-6 Astra (Medium) (OpenAI): intelligence 51.60, $2638GPT-6 Astra (Xhigh) (OpenAI): intelligence 55.30, $3746GPT-6 Luna (Max) (OpenAI): intelligence 27.90, $136GPT-6 Luna (Non-reasoning) (OpenAI): intelligence 9.40, $53.1GPT-6 Luna (Xhigh) (OpenAI): intelligence 23.50, $85.7GPT-6 Sol (Max) (OpenAI): intelligence 44.20, $1930GPT-6.1 Sol (Low) (OpenAI): intelligence 34.80, $238GPT-6.1 Terra (Low) (OpenAI): intelligence 29.40, $111GPT-6.1 Terra (Max) (OpenAI): intelligence 51.30, $972GPT-6.1 Terra (Non-reasoning) (OpenAI): intelligence 30.50, $213GPT-6.1 Terra (Xhigh) (OpenAI): intelligence 45.30, $400Granite 4.2 8B (IBM): intelligence 5.10, $46.9Grok 4.6 (Xhigh) (SpaceXAI): intelligence 31.00, $3391Grok 4.7 (High) (SpaceXAI): intelligence 35.20, $4722Grok 4.7 (Low) (SpaceXAI): intelligence 31.10, $2169Grok 4.7 (Xhigh) (SpaceXAI): intelligence 35.50, $5906Inkling (Xhigh) (Thinking Machines): intelligence 12.50, $1237Inkling 2 Small (Thinking Machines): intelligence 30.60, $792Inkling Small (Thinking Machines): intelligence 12.90, $225Kimi K3 (Low) (Kimi): intelligence 17.40, $1764Kimi K3.1 Pro (Kimi): intelligence 46.50, $3153Ling 3.1 Flash 1019 (InclusionAI): intelligence 29.60, $2009MiMo-V2.6-Flash (Xiaomi): intelligence 26.70, $106MiMo-V2.6-Pro (Xiaomi): intelligence 29.90, $221MiniMax-M3 (MiniMax): intelligence 18.90, $878MiniMax-M3.1-Flash (MiniMax): intelligence 29.10, $358Mistral Large 4 (High) (Mistral): intelligence 26.10, $1360Mistral Large 4 (Medium) (Mistral): intelligence 23.10, $936Mistral Large 4 Preview (Mistral): intelligence 25.30, $2923Mistral Medium 3.5 (Mistral): intelligence 4.60, $1103Mistral Small 4 (Reasoning) (Mistral): intelligence 4.30, $43.4Muse Glimmer (High) (Meta): intelligence 6.30, $191Muse Spark 1.3 (Max) (Meta): intelligence 36.60, $1906Muse Spark Open (Xhigh) (Meta): intelligence 24.90, $1697Muse Wonder (High) (Meta): intelligence 40.50, $3520Muse Wonder (Max) (Meta): intelligence 43.60, $5414Nemotron 3 Ultra 550B A55B (Reasoning) (NVIDIA): intelligence 11.80, $1542Nemotron 3.5 Lightning (NVIDIA): intelligence 5.50, $227Nemotron 3.5 Super VL (NVIDIA): intelligence 13.60, $447Qwen3.8 27B (Low) (Alibaba): intelligence 15.70, $1460Qwen3.8 27B (Medium) (Alibaba): intelligence 17.50, $1636Qwen3.8 27B (Non-reasoning) (Alibaba): intelligence 10.00, $2642Qwen3.8 27B (Xhigh) (Alibaba): intelligence 20.10, $2390Qwen3.8 Max (0902) (Alibaba): intelligence 33.70, $6354Step 5 Preview (StepFun): intelligence 28.50, $1644Tencent Hy4 (Tencent): intelligence 34.60, $1021GPT-6 Luna (Low) (OpenAI): intelligence 9.70, $9.09GPT-6 Luna (Medium) (OpenAI): intelligence 18.50, $39.5Claude Haiku 5.5 (Low) (Anthropic): intelligence 18.60, $39.6GPT-6 Luna (High) (OpenAI): intelligence 21.40, $62.6Claude Haiku 5.5 (Medium) (Anthropic): intelligence 24.60, $72.7Muse Ember (Xhigh) (Meta): intelligence 34.10, $95.7Muse Ember (Max) (Meta): intelligence 36.00, $117GPT-6.1 Terra (Medium) (OpenAI): intelligence 38.20, $190GPT-6.1 Terra (High) (OpenAI): intelligence 42.40, $267GPT-6.1 Sol (Medium) (OpenAI): intelligence 46.30, $389GPT-6.1 Sol (High) (OpenAI): intelligence 50.30, $573GPT-6.1 Sol (Xhigh) (OpenAI): intelligence 52.50, $718GPT-6.1 Sol (Max) (OpenAI): intelligence 54.60, $1124GPT-6 Astra (High) (OpenAI): intelligence 54.80, $3204Claude Opus 5.5 (Xhigh, Default Fallback) (Anthropic): intelligence 57.40, $4766Gemini 4 Carbon (Medium) (Google): intelligence 58.30, $5903Claude Fable 5.2 (Low, Default Fallback) (Anthropic): intelligence 53.90, $2862Claude Fable 5.2 (High, Default Fallback) (Anthropic): intelligence 61.80, $7106Claude Fable 5.2 (Xhigh, Default Fallback) (Anthropic): intelligence 62.20, $11742Claude Fable 5.2 (Max, Default Fallback) (Anthropic): intelligence 64.60, $22191Claude Fable 5.2 (Medium, Default Fallback) (Anthropic): intelligence 56.40, $3360Claude Fable 5.2 (Medium, Default Fallback)(Low, Default Fallback)(High, Default Fallback)(Xhigh, Default Fallback)(Max, Default Fallback)GPT-6 Luna (Low)
Claude Fable 5.2 (Medium, Default Fallback)Same release, other effort levelsToday's Pareto frontierEvery other model
Up and left is better. Dotted line: today's Pareto frontier. Hover a point for its numbers, click it for its page.

Intelligence: Artificial Analysis Intelligence Index. Cost: total cost to run that benchmark, so reasoning tokens count. API id: claude-fable-5-2-medium.

Matchup

Compare head to head

Suggested: what beats it, its effort levels, and frontier models near its price.

Compare Claude Fable 5.2 (Medium, Default Fallback) with measured models

Release

What the Claude Fable 5.2 release did to the frontier on 2026-11-09

4 of 5 effort levels reached the frontier at launch (Claude Fable 5.2 (Medium, Default Fallback), Claude Fable 5.2 (High, Default Fallback), Claude Fable 5.2 (Xhigh, Default Fallback), Claude Fable 5.2 (Max, Default Fallback)). Impact 2.92, #14 of 26 releases this past year.

Release page: launch-day frontier and every effort level

Deciding

Should you use Claude Fable 5.2 (Medium, Default Fallback)?

Should you use Claude Fable 5.2 (Medium, Default Fallback)?

Yes, for the money: nothing live under $10,000 is both smarter and cheaper to run, so it sits on the value frontier.

What is better and cheaper than Claude Fable 5.2 (Medium, Default Fallback)?

Nothing: no live model under $10,000 is both smarter and cheaper.

How much does Claude Fable 5.2 (Medium, Default Fallback) cost?

$8.00/$40 in/out per 1M tokens, and $3360 to run the full Artificial Analysis Intelligence Index, the honest all-in number for reasoning models.

Is Claude Fable 5.2 (Medium, Default Fallback) on the Pareto frontier?

Yes: Claude Fable 5.2 (Medium, Default Fallback) is on the intelligence-vs-cost Pareto frontier.

Frontier membership by axis pair

Other axis pairs where Claude Fable 5.2 (Medium, Default Fallback) is Pareto-optimal.

Y axisX axisOn the frontier
AA intelligence indexAA total cost to run (USD)
AA intelligence indexEnd-to-end total secondsno data
AA intelligence indexOutput speed tokens/secno data
Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/models/claude-fable-5-2-medium · Markdown: /api/v1/models/claude-fable-5-2-medium?format=md · llms.txt · agent skill