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Claude Opus 5.5 vs Gemma 4 31B

Claude Opus 5.5 leads the LLM Stats Score 59.7 to 33.1. Gemma 4 31B is 52.5x cheaper per token.

Anthropic · Google · Updated for 2026

Which is better?

Claude Opus 5.5 leads the overall LLM Stats Score 59.7 to 33.1, ranking #1 overall.

On price, Gemma 4 31B is roughly 52.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Opus 5.5 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

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

Choose Claude Opus 5.5

  • overall performance matters — it scores 59.7 and ranks #1 on LLM Stats
  • your work emphasizes reasoning and agents — it leads those capability indexes
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Sep 2026

Choose Gemma 4 31B

  • cost matters — it's about 52.5x cheaper per token
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Opus 5.5
Anthropic
Gemma 4 31B
Google
Core performance indexes
LLM Stats Score
59.7
#1
33.1
#107
Reasoning
57.8
#1
33.6
#100
Agents
44.5
#2
13.6
#97
Cost, coverage & limits
Benchmark wins
—
—
Input price
$4.00 / M
$0.09 / M
Output price
$20.00 / M
$0.34 / M
Context window
1,000,000
262,144

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Claude Opus 5.5
Gemma 4 31B
Math
42.5#5
29.4#85
Vision
42.8#1
19.6#77
Multimodal
42.5#1
22.4#64
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

31 reported for Claude Opus 5.5 · 12 for Gemma 4 31B

No common benchmarks found

Claude Opus 5.5 and Gemma 4 31Bdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Gemma 4 31B costs less

For input processing, Claude Opus 5.5 ($4.00/1M tokens) is 44.4x more expensive than Gemma 4 31B ($0.09/1M tokens).

For output processing, Claude Opus 5.5 ($20.00/1M tokens) is 58.8x more expensive than Gemma 4 31B ($0.34/1M tokens).

In conclusion, Claude Opus 5.5 is more expensive than Gemma 4 31B.*

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

Lowest available price from all providers
Wed Sep 23 2026 • llm-stats.com
Anthropic
Claude Opus 5.5
Input tokens$4.00
Output tokens$20.00
Best providerAnthropic
Google
Gemma 4 31B
Input tokens$0.09
Output tokens$0.34
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Opus 5.5 accepts 1,000,000 input tokens compared to Gemma 4 31B's 262,144 tokens. Gemma 4 31B can generate longer responses up to 262,144 tokens, while Claude Opus 5.5 is limited to 128,000 tokens.

Anthropic
Claude Opus 5.5
Input1,000,000 tokens
Output128,000 tokens
Google
Gemma 4 31B
Input262,144 tokens
Output262,144 tokens
Wed Sep 23 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Opus 5.5 and Gemma 4 31B support multimodal inputs.

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

Claude Opus 5.5

Text
Images
Audio
Video

Gemma 4 31B

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 5.5 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 Opus 5.5

Proprietary

Closed source

Gemma 4 31B

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Opus 5.5 was released on 2026-09-22, while Gemma 4 31B was released on 2026-04-02.

Claude Opus 5.5 is 6 months newer than Gemma 4 31B.

Claude Opus 5.5

Sep 22, 2026

0 days ago

5mo newer
Gemma 4 31B

Apr 2, 2026

5 months ago

Knowledge Cutoff

When training data ends

Claude Opus 5.5 has a knowledge cutoff of 2026-06-01, while Gemma 4 31B has a cutoff of 2025-01-01.

Claude Opus 5.5 has more recent training data (up to 2026-06-01), making it potentially better informed about events through that date compared to Gemma 4 31B (2025-01-01).

Claude Opus 5.5

Jun 2026

1.4 yr newer
Gemma 4 31B

Jan 2025

Provider Availability

Claude Opus 5.5 is available from Anthropic. Gemma 4 31B is available from DeepInfra, FriendliAI, Novita, Together.

Claude Opus 5.5

anthropic logo
Anthropic
Input Price:Input: $4.00/1MOutput Price:Output: $20.00/1M

Gemma 4 31B

deepinfra logo
Deepinfra
Input Price:Input: $0.09/1MOutput Price:Output: $0.34/1M
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→

Judge for yourself.

Run your own prompts against Claude Opus 5.5 and Gemma 4 31B side-by-side, then vote on the output you prefer.

Claude Opus 5.5
✓ Preferred
Gemma 4 31B
Open in Playground

FAQ

Common questions about Claude Opus 5.5 vs Gemma 4 31B.

Which is better, Claude Opus 5.5 or Gemma 4 31B?

Claude Opus 5.5 leads the LLM Stats Score 59.7 to 33.1. Claude Opus 5.5 is made by Anthropic and Gemma 4 31B 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 Opus 5.5 compare to Gemma 4 31B in benchmarks?

Claude Opus 5.5 scores BenchCAD (with Python tool): 96.2%, Global-MMLU: 94.3%, SWE-bench Multilingual: 93.9%, MILU: 93.1%, ArXivMath: 91.2%. Gemma 4 31B scores AIME 2026: 89.2%, MMMLU: 88.4%, t2-bench: 86.4%, MathVision: 85.6%, MMLU-Pro: 85.2%.

Is Claude Opus 5.5 cheaper than Gemma 4 31B?

Gemma 4 31B is 44.4x cheaper for input tokens. Claude Opus 5.5 costs $4.00/M input and $20.00/M output via anthropic. Gemma 4 31B costs $0.09/M input and $0.34/M output via deepinfra.

What are the context window sizes for Claude Opus 5.5 and Gemma 4 31B?

Claude Opus 5.5 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 Opus 5.5 and Gemma 4 31B?

Key differences include LLM Stats Score (59.7 vs 33.1), context window (1.0M vs 262K), input pricing ($4.00 vs $0.09/M), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5.5 and Gemma 4 31B?

Claude Opus 5.5 is developed by Anthropic and Gemma 4 31B is developed by Google.

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