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Claude Fable 5 vs Gemini 3.1 Pro

Claude Fable 5 leads the LLM Stats Score 53.7 to 43.2. Gemini 3.1 Pro is 4.4x cheaper per token.

Anthropic · Google · Updated for 2026

Which is better?

Claude Fable 5 leads the overall LLM Stats Score 53.7 to 43.2, ranking #9 overall.

In the 8 individual benchmarks reported for both models, Claude Fable 5 wins 7; this is a narrower head-to-head signal than the composite indexes.

On price, Gemini 3.1 Pro is roughly 4.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Fable 5

  • overall performance matters — it scores 53.7 and ranks #9 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 7 of 8 exact shared results
  • you want the most recent training data — it shipped Jun 2026

Choose Gemini 3.1 Pro

  • cost matters — it's about 4.4x cheaper per token

At a glance

The differences that matter most.

Claude Fable 5
Anthropic
Gemini 3.1 Pro
Google
Core performance indexes
LLM Stats Score
53.7
#9
43.2
#47
Reasoning
51.1
#10
44.9
#34
Coding
44.4
#5
30.7
#50
Agents
39.6
#6
24.1
#58
Cost, coverage & limits
Benchmark wins
7 of 8
1 of 8
Input price
$10.00 / M
$2.00 / M
Output price
$50.00 / M
$12.00 / M
Context window
1,000,000
1,000,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Claude Fable 5
Gemini 3.1 Pro
Math
41.4#8
42.4#6
Vision
35.7#10
31.0#30
Tool use
23.1#39
22.8#42
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

19 reported for Claude Fable 5 · 20 for Gemini 3.1 Pro

8 shared

Claude Fable 5 outperforms in 7 benchmarks (DeepSWE 1.1, Finance Agent v2, FrontierSWE, Humanity's Last Exam, Legal Agent Benchmark, SWE-Bench Pro, SWE-Bench Verified), while Gemini 3.1 Pro is better at 1 benchmark (LiveBench).

Claude Fable 5 significantly outperforms across most benchmarks.

Fri Oct 02 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Gemini 3.1 Pro costs less

For input processing, Claude Fable 5 ($10.00/1M tokens) is 5.0x more expensive than Gemini 3.1 Pro ($2.00/1M tokens).

For output processing, Claude Fable 5 ($50.00/1M tokens) is 4.2x more expensive than Gemini 3.1 Pro ($12.00/1M tokens).

In conclusion, Claude Fable 5 is more expensive than Gemini 3.1 Pro.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Fri Oct 02 2026 • llm-stats.com
Anthropic
Claude Fable 5
Input tokens$10.00
Output tokens$50.00
Best providerAnthropic
Google
Gemini 3.1 Pro
Input tokens$2.00
Output tokens$12.00
Best providerDeepinfra
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,000,000 tokens. Gemini 3.1 Pro can generate longer responses up to 1,000,000 tokens, while Claude Fable 5 is limited to 128,000 tokens.

Anthropic
Claude Fable 5
Input1,000,000 tokens
Output128,000 tokens
Google
Gemini 3.1 Pro
Input1,000,000 tokens
Output1,000,000 tokens
Fri Oct 02 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Fable 5 and Gemini 3.1 Pro support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Fable 5

Text
Images
Audio
Video

Gemini 3.1 Pro

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Fable 5

Proprietary

Closed source

Gemini 3.1 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Fable 5 was released on 2026-06-09, while Gemini 3.1 Pro was released on 2026-02-19.

Claude Fable 5 is 4 months newer than Gemini 3.1 Pro.

Claude Fable 5

Jun 9, 2026

3 months ago

3mo newer
Gemini 3.1 Pro

Feb 19, 2026

7 months ago

Knowledge Cutoff

When training data ends

Gemini 3.1 Pro has a documented knowledge cutoff of 2025-01-31, while Claude Fable 5's cutoff date is not specified.

We can confirm Gemini 3.1 Pro's training data extends to 2025-01-31, but cannot make a direct comparison without Claude Fable 5's cutoff date.

Claude Fable 5

—

Gemini 3.1 Pro

Jan 2025

Provider Availability

Claude Fable 5 is available from Anthropic, DeepInfra. Gemini 3.1 Pro is available from DeepInfra, Google.

Claude Fable 5

anthropic logo
Anthropic
Input Price:Input: $10.00/1MOutput Price:Output: $50.00/1M
deepinfra logo
Deepinfra
Input Price:Input: $10.00/1MOutput Price:Output: $50.00/1M

Gemini 3.1 Pro

deepinfra logo
Deepinfra
Input Price:Input: $2.00/1MOutput Price:Output: $12.00/1M
google logo
Google
Input Price:Input: $2.50/1MOutput Price:Output: $15.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Fable 5 and Gemini 3.1 Pro side-by-side, then vote on the output you prefer.

Claude Fable 5
✓ Preferred
Gemini 3.1 Pro
Open in Playground

FAQ

Common questions about Claude Fable 5 vs Gemini 3.1 Pro.

Which is better, Claude Fable 5 or Gemini 3.1 Pro?

Claude Fable 5 leads the LLM Stats Score 53.7 to 43.2. Claude Fable 5 is made by Anthropic and Gemini 3.1 Pro is made by Google. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Fable 5 compare to Gemini 3.1 Pro in benchmarks?

Claude Fable 5 scores SWE-Bench Verified: 95.0%, FrontierSWE: 90.0%, OSWorld-Verified: 85.0%, Terminal-Bench 2.1: 84.3%, SWE-Bench Pro: 80.0%. Gemini 3.1 Pro scores t2-bench: 99.3%, LiveCodeBench Pro: 96.2%, GPQA: 94.3%, MMMLU: 92.6%, BrowseComp: 85.9%.

Is Claude Fable 5 cheaper than Gemini 3.1 Pro?

Gemini 3.1 Pro is 5.0x cheaper for input tokens. Claude Fable 5 costs $10.00/M input and $50.00/M output via anthropic. Gemini 3.1 Pro costs $2.00/M input and $12.00/M output via deepinfra.

What are the context window sizes for Claude Fable 5 and Gemini 3.1 Pro?

Claude Fable 5 supports 1.0M tokens and Gemini 3.1 Pro supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Fable 5 and Gemini 3.1 Pro?

Key differences include LLM Stats Score (53.7 vs 43.2), input pricing ($10.00 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Fable 5 and Gemini 3.1 Pro?

Claude Fable 5 is developed by Anthropic and Gemini 3.1 Pro is developed by Google.

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