Model Comparison

Gemini 3.1 Pro vs Claude Opus 4.5Which is better in 2026?

Gemini 3.1 Pro significantly outperforms across most benchmarks. Gemini 3.1 Pro is 1.8x cheaper per token.

Verdict: Gemini 3.1 Pro vs Claude Opus 4.5 — which is better?

Gemini 3.1 Pro (by Google) and Claude Opus 4.5 (by Anthropic) 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.

Gemini 3.1 Pro outperforms in 5 benchmarks (ARC-AGI v2, GPQA, MCP Atlas, MMMLU, Terminal-Bench 2.0), while Claude Opus 4.5 is better at 1 benchmark (SWE-Bench Verified). Gemini 3.1 Pro significantly outperforms across most benchmarks.

On price, Gemini 3.1 Pro is roughly 1.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 3.1 Pro also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Gemini 3.1 Pro if…

  • you want the strongest raw capability — it leads on 5 of 6 shared benchmarks
  • cost matters — it's about 1.8x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Feb 2026

Choose Claude Opus 4.5 if…

  • you want predictable pricing at $5.00/M input and $25.00/M output
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

Gemini 3.1 Pro outperforms in 5 benchmarks (ARC-AGI v2, GPQA, MCP Atlas, MMMLU, Terminal-Bench 2.0), while Claude Opus 4.5 is better at 1 benchmark (SWE-Bench Verified).

Gemini 3.1 Pro significantly outperforms across most benchmarks.

Sat Jun 06 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 3.1 Pro costs less

For input processing, Gemini 3.1 Pro ($2.50/1M tokens) is 2.0x cheaper than Claude Opus 4.5 ($5.00/1M tokens).

For output processing, Gemini 3.1 Pro ($15.00/1M tokens) is 1.7x cheaper than Claude Opus 4.5 ($25.00/1M tokens).

In conclusion, Claude Opus 4.5 is more expensive than Gemini 3.1 Pro.*

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

Lowest available price from all providers
Sat Jun 06 2026 • llm-stats.com
Google
Gemini 3.1 Pro
Input tokens$2.50
Output tokens$15.00
Best providerGoogle
Anthropic
Claude Opus 4.5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 3.1 Pro accepts 1,048,576 input tokens compared to Claude Opus 4.5's 200,000 tokens. Gemini 3.1 Pro can generate longer responses up to 65,536 tokens, while Claude Opus 4.5 is limited to 64,000 tokens.

Google
Gemini 3.1 Pro
Input1,048,576 tokens
Output65,536 tokens
Anthropic
Claude Opus 4.5
Input200,000 tokens
Output64,000 tokens
Sat Jun 06 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3.1 Pro and Claude Opus 4.5 support multimodal inputs.

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

Gemini 3.1 Pro

Text
Images
Audio
Video

Claude Opus 4.5

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.

Gemini 3.1 Pro

Proprietary

Closed source

Claude Opus 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.1 Pro was released on 2026-02-19, while Claude Opus 4.5 was released on 2025-11-24.

Gemini 3.1 Pro is 3 months newer than Claude Opus 4.5.

Gemini 3.1 Pro

Feb 19, 2026

3 months ago

2mo newer
Claude Opus 4.5

Nov 24, 2025

6 months ago

Knowledge Cutoff

When training data ends

Gemini 3.1 Pro has a knowledge cutoff of 2025-01-31, while Claude Opus 4.5 has a cutoff of 2025-03-31.

Claude Opus 4.5 has more recent training data (up to 2025-03-31), making it potentially better informed about events through that date compared to Gemini 3.1 Pro (2025-01-31).

Gemini 3.1 Pro

Jan 2025

Claude Opus 4.5

Mar 2025

2 mo newer

Provider Availability

Gemini 3.1 Pro is available from Google. Claude Opus 4.5 is available from Anthropic.

Gemini 3.1 Pro

google logo
Google
Input Price:Input: $2.50/1MOutput Price:Output: $15.00/1M

Claude Opus 4.5

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
Higher ARC-AGI v2 score (77.1% vs 37.6%)
Higher GPQA score (94.3% vs 87.0%)
Higher MCP Atlas score (69.2% vs 62.3%)
Higher MMMLU score (92.6% vs 90.8%)
Higher Terminal-Bench 2.0 score (68.5% vs 59.3%)
Anthropic
Higher SWE-Bench Verified score (80.9% vs 80.6%)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 3.1 Pro
Anthropic
Claude Opus 4.5

FAQ

Common questions about Gemini 3.1 Pro vs Claude Opus 4.5.

Which is better, Gemini 3.1 Pro or Claude Opus 4.5?

Gemini 3.1 Pro significantly outperforms across most benchmarks. Gemini 3.1 Pro is made by Google and Claude Opus 4.5 is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 3.1 Pro compare to Claude Opus 4.5 in benchmarks?

Gemini 3.1 Pro scores t2-bench: 99.3%, LiveCodeBench Pro: 96.2%, GPQA: 94.3%, MMMLU: 92.6%, BrowseComp: 85.9%. Claude Opus 4.5 scores Tau2 Telecom: 98.2%, MMMLU: 90.8%, Tau2 Retail: 88.9%, GPQA: 87.0%, SWE-Bench Verified: 80.9%.

Is Gemini 3.1 Pro cheaper than Claude Opus 4.5?

Gemini 3.1 Pro is 2.0x cheaper for input tokens. Gemini 3.1 Pro costs $2.50/M input and $15.00/M output via google. Claude Opus 4.5 costs $5.00/M input and $25.00/M output via anthropic.

What are the context window sizes for Gemini 3.1 Pro and Claude Opus 4.5?

Gemini 3.1 Pro supports 1.0M tokens and Claude Opus 4.5 supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3.1 Pro and Claude Opus 4.5?

Key differences include context window (1.0M vs 200K), input pricing ($2.50 vs $5.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.1 Pro and Claude Opus 4.5?

Gemini 3.1 Pro is developed by Google and Claude Opus 4.5 is developed by Anthropic.

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