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Claude Opus 5.5 vs Gemini 1.0 Pro

Claude Opus 5.5 leads the LLM Stats Score 59.8 to -5.4. Gemini 1.0 Pro is 10.7x cheaper per token.

Anthropic · Google · Updated for 2026

Which is better?

Claude Opus 5.5 leads the overall LLM Stats Score 59.8 to -5.4, ranking #1 overall.

On price, Gemini 1.0 Pro is roughly 10.7x 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 59.8 and ranks #1 on LLM Stats
  • your work emphasizes reasoning — 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 Gemini 1.0 Pro

  • cost matters — it's about 10.7x cheaper per token

At a glance

The differences that matter most.

Claude Opus 5.5
Anthropic
Gemini 1.0 Pro
Google
Core performance indexes
LLM Stats Score
59.8
#1
-5.4
#361
Reasoning
57.9
#1
-8.0
#360
Cost, coverage & limits
Benchmark wins
—
—
Input price
$4.00 / M
$0.50 / M
Output price
$20.00 / M
$1.50 / M
Context window
1,000,000
32,760

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Claude Opus 5.5
Gemini 1.0 Pro
Math
42.5#5
-1.7#306
Vision
42.9#1
-8.7#207
Multimodal
42.6#1
-6.2#168
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

31 reported for Claude Opus 5.5 · 9 for Gemini 1.0 Pro

No common benchmarks found

Claude Opus 5.5 and Gemini 1.0 Prodon'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

Gemini 1.0 Pro costs less

For input processing, Claude Opus 5.5 ($4.00/1M tokens) is 8.0x more expensive than Gemini 1.0 Pro ($0.50/1M tokens).

For output processing, Claude Opus 5.5 ($20.00/1M tokens) is 13.3x more expensive than Gemini 1.0 Pro ($1.50/1M tokens).

In conclusion, Claude Opus 5.5 is more expensive than Gemini 1.0 Pro.*

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

Lowest available price from all providers
Tue Sep 22 2026 • llm-stats.com
Anthropic
Claude Opus 5.5
Input tokens$4.00
Output tokens$20.00
Best providerAnthropic
Google
Gemini 1.0 Pro
Input tokens$0.50
Output tokens$1.50
Best providerGoogle
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 Gemini 1.0 Pro's 32,760 tokens. Claude Opus 5.5 can generate longer responses up to 128,000 tokens, while Gemini 1.0 Pro is limited to 8,192 tokens.

Anthropic
Claude Opus 5.5
Input1,000,000 tokens
Output128,000 tokens
Google
Gemini 1.0 Pro
Input32,760 tokens
Output8,192 tokens
Tue Sep 22 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Opus 5.5 supports multimodal inputs, whereas Gemini 1.0 Pro does not.

Claude Opus 5.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Opus 5.5

Text
Images
Audio
Video

Gemini 1.0 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 Opus 5.5

Proprietary

Closed source

Gemini 1.0 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 5.5 was released on 2026-09-22, while Gemini 1.0 Pro was released on 2024-02-15.

Claude Opus 5.5 is 32 months newer than Gemini 1.0 Pro.

Claude Opus 5.5

Sep 22, 2026

0 days ago

2.6yr newer
Gemini 1.0 Pro

Feb 15, 2024

2.6 years ago

Knowledge Cutoff

When training data ends

Claude Opus 5.5 has a knowledge cutoff of 2026-06-01, while Gemini 1.0 Pro has a cutoff of 2024-02-01.

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 Gemini 1.0 Pro (2024-02-01).

Claude Opus 5.5

Jun 2026

2.3 yr newer
Gemini 1.0 Pro

Feb 2024

Provider Availability

Claude Opus 5.5 is available from Anthropic. Gemini 1.0 Pro is available from Google.

Claude Opus 5.5

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

Gemini 1.0 Pro

google logo
Google
Input Price:Input: $0.50/1MOutput Price:Output: $1.50/1M
* 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 Gemini 1.0 Pro side-by-side, then vote on the output you prefer.

Claude Opus 5.5
✓ Preferred
Gemini 1.0 Pro
Open in Playground

FAQ

Common questions about Claude Opus 5.5 vs Gemini 1.0 Pro.

Which is better, Claude Opus 5.5 or Gemini 1.0 Pro?

Claude Opus 5.5 leads the LLM Stats Score 59.8 to -5.4. Claude Opus 5.5 is made by Anthropic and Gemini 1.0 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 Opus 5.5 compare to Gemini 1.0 Pro 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%. Gemini 1.0 Pro scores FLEURS: 93.6%, BIG-Bench: 75.0%, MMLU: 71.8%, WMT23: 71.7%, EgoSchema: 55.7%.

Is Claude Opus 5.5 cheaper than Gemini 1.0 Pro?

Gemini 1.0 Pro is 8.0x cheaper for input tokens. Claude Opus 5.5 costs $4.00/M input and $20.00/M output via anthropic. Gemini 1.0 Pro costs $0.50/M input and $1.50/M output via google.

What are the context window sizes for Claude Opus 5.5 and Gemini 1.0 Pro?

Claude Opus 5.5 supports 1.0M tokens and Gemini 1.0 Pro supports 33K 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 Gemini 1.0 Pro?

Key differences include LLM Stats Score (59.8 vs -5.4), context window (1.0M vs 33K), input pricing ($4.00 vs $0.50/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5.5 and Gemini 1.0 Pro?

Claude Opus 5.5 is developed by Anthropic and Gemini 1.0 Pro is developed by Google.

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