Model Comparison

Claude Fable 5 vs Gemma 4 31BWhich is better in 2026?

Claude Fable 5 significantly outperforms across most benchmarks. Gemma 4 31B is 103.9x cheaper per token.

Verdict: Claude Fable 5 vs Gemma 4 31B — which is better?

Claude Fable 5 (by Anthropic) and Gemma 4 31B (by Google) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Claude Fable 5 outperforms in 2 benchmarks (GDPval-AA, Humanity's Last Exam), while Gemma 4 31B is better at 0 benchmarks. Claude Fable 5 significantly outperforms across most benchmarks.

On price, Gemma 4 31B is roughly 103.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Fable 5 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude Fable 5 if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Jun 2026

Choose Gemma 4 31B if…

  • cost matters — it's about 103.9x cheaper per token
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Claude Fable 5 outperforms in 2 benchmarks (GDPval-AA, Humanity's Last Exam), while Gemma 4 31B is better at 0 benchmarks.

Claude Fable 5 significantly outperforms across most benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemma 4 31B costs less

For input processing, Claude Fable 5 ($10.00/1M tokens) is 76.9x more expensive than Gemma 4 31B ($0.13/1M tokens).

For output processing, Claude Fable 5 ($50.00/1M tokens) is 131.6x more expensive than Gemma 4 31B ($0.38/1M tokens).

In conclusion, Claude Fable 5 is more expensive than Gemma 4 31B.*

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

Lowest available price from all providers
Fri Jul 17 2026 • llm-stats.com
Anthropic
Claude Fable 5
Input tokens$10.00
Output tokens$50.00
Best providerAnthropic
Google
Gemma 4 31B
Input tokens$0.13
Output tokens$0.38
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Fable 5 accepts 1,000,000 input tokens compared to Gemma 4 31B's 262,144 tokens. Gemma 4 31B can generate longer responses up to 131,072 tokens, while Claude Fable 5 is limited to 128,000 tokens.

Anthropic
Claude Fable 5
Input1,000,000 tokens
Output128,000 tokens
Google
Gemma 4 31B
Input262,144 tokens
Output131,072 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Fable 5 and Gemma 4 31B support multimodal inputs.

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

Claude Fable 5

Text
Images
Audio
Video

Gemma 4 31B

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Fable 5 is licensed under a proprietary license, while Gemma 4 31B uses Apache 2.0.

License differences may affect how you can use these models in commercial or open-source projects.

Claude Fable 5

Proprietary

Closed source

Gemma 4 31B

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Fable 5 was released on 2026-06-09, while Gemma 4 31B was released on 2026-04-02.

Claude Fable 5 is 2 months newer than Gemma 4 31B.

Claude Fable 5

Jun 9, 2026

1 months ago

2mo newer
Gemma 4 31B

Apr 2, 2026

3 months ago

Knowledge Cutoff

When training data ends

Gemma 4 31B has a documented knowledge cutoff of 2025-01-01, while Claude Fable 5's cutoff date is not specified.

We can confirm Gemma 4 31B's training data extends to 2025-01-01, but cannot make a direct comparison without Claude Fable 5's cutoff date.

Claude Fable 5

—

Gemma 4 31B

Jan 2025

Provider Availability

Claude Fable 5 is available from Anthropic. Gemma 4 31B is available from DeepInfra, FriendliAI, Novita, Together.

Claude Fable 5

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

Gemma 4 31B

deepinfra logo
Deepinfra
Input Price:Input: $0.13/1MOutput Price:Output: $0.38/1M
friendli logo
FriendliAI
Input Price:Input: $0.14/1MOutput Price:Output: $0.40/1M
novita logo
Novita
Input Price:Input: $0.14/1MOutput Price:Output: $0.40/1M
together logo
Together
Input Price:Input: $0.39/1MOutput Price:Output: $0.97/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Larger context window (1,000,000 tokens)
Higher GDPval-AA score (60.5% vs 26.1%)
Higher Humanity's Last Exam score (64.5% vs 26.5%)
Google
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Fable 5 and Gemma 4 31B side-by-side, then vote on the output you prefer.

Claude Fable 5
✓ Preferred
Gemma 4 31B
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Fable 5
Google
Gemma 4 31B

FAQ

Common questions about Claude Fable 5 vs Gemma 4 31B.

Which is better, Claude Fable 5 or Gemma 4 31B?

Claude Fable 5 significantly outperforms across most benchmarks. Claude Fable 5 is made by Anthropic and Gemma 4 31B is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Fable 5 compare to Gemma 4 31B 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%. Gemma 4 31B scores AIME 2026: 89.2%, MMMLU: 88.4%, t2-bench: 86.4%, MathVision: 85.6%, MMLU-Pro: 85.2%.

Is Claude Fable 5 cheaper than Gemma 4 31B?

Gemma 4 31B is 76.9x cheaper for input tokens. Claude Fable 5 costs $10.00/M input and $50.00/M output via anthropic. Gemma 4 31B costs $0.13/M input and $0.38/M output via deepinfra.

What are the context window sizes for Claude Fable 5 and Gemma 4 31B?

Claude Fable 5 supports 1.0M tokens and Gemma 4 31B supports 262K 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 Gemma 4 31B?

Key differences include context window (1.0M vs 262K), input pricing ($10.00 vs $0.13/M), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Fable 5 and Gemma 4 31B?

Claude Fable 5 is developed by Anthropic and Gemma 4 31B is developed by Google.

Related comparisons