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Claude Opus 4vsGemini 1.5 Pro

Anthropic vs Google DeepMind — Side-by-side model comparison

Gemini 1.5 Pro leads 3/5 categories

Head-to-Head Comparison

MetricClaude Opus 4Gemini 1.5 Pro
Provider
Arena Rank
#1
#4
Context Window
200K
1M
Input Pricing
$5.00/1M tokens
$3.50/1M tokens
Output Pricing
$25.00/1M tokens
$10.50/1M tokens
Parameters
Undisclosed
Undisclosed
Open Source
No
No
Best For
Complex reasoning, coding, agentic tasks
Long documents, multimodal analysis, coding
Release Date
May 22, 2025
May 14, 2024

Claude Opus 4

Claude Opus 4 is Anthropic's most powerful AI model, holding the #1 position on the Chatbot Arena leaderboard. It represents a breakthrough in extended thinking and agentic capabilities, able to work autonomously on complex multi-step tasks for hours. With a 200K token context window, it excels at analyzing entire codebases, lengthy legal documents, and research papers in a single pass. The model demonstrates exceptional performance in coding (setting new benchmarks on SWE-bench), advanced reasoning, and nuanced writing tasks. Its agentic capabilities allow it to use tools, navigate computers, and execute multi-step workflows with minimal human oversight. Opus 4 is the preferred choice for enterprises requiring the highest quality output on mission-critical tasks where accuracy and depth matter more than speed or cost.

View Anthropic profile →

Gemini 1.5 Pro

Gemini 1.5 Pro is Google DeepMind's flagship multimodal model featuring an industry-leading 1 million token context window, capable of processing entire codebases, books, or hours of video in a single prompt. It demonstrates exceptional performance on long-context reasoning tasks, multimodal understanding across text, images, audio, and video, and complex coding challenges. The massive context window opens entirely new use cases that were previously impossible with shorter-context models.

View Google DeepMind profile →

Key Differences: Claude Opus 4 vs Gemini 1.5 Pro

1

Claude Opus 4 ranks higher in arena benchmarks (#1) indicating stronger overall performance.

2

Gemini 1.5 Pro is 2.1x cheaper on average, making it the better choice for high-volume applications.

3

Gemini 1.5 Pro supports a larger context window (1M), allowing it to process longer documents in a single request.

C

When to use Claude Opus 4

  • +You need the highest quality output based on arena rankings
  • +Quality matters more than cost
  • +Your use case involves complex reasoning, coding, agentic tasks
View full Claude Opus 4 specs →
G

When to use Gemini 1.5 Pro

  • +Budget is a concern and you need cost efficiency
  • +You need to process long documents (1M context)
  • +Your use case involves long documents, multimodal analysis, coding
View full Gemini 1.5 Pro specs →

Cost Analysis

At current pricing, Gemini 1.5 Pro is 2.1x more affordable than Claude Opus 4. For a typical enterprise workload processing 100M tokens per month:

Claude Opus 4 monthly cost

$1,500

100M tokens/mo (50/50 in/out)

Gemini 1.5 Pro monthly cost

$700

100M tokens/mo (50/50 in/out)

The Verdict

Gemini 1.5 Pro wins our head-to-head comparison with 3 out of 5 category wins. It's the stronger choice for long documents, multimodal analysis, coding, though Claude Opus 4 holds an edge in complex reasoning, coding, agentic tasks.

Last compared: March 2026 · Data sourced from public benchmarks and official pricing pages

Frequently Asked Questions

Which is better, Claude Opus 4 or Gemini 1.5 Pro?
In our head-to-head comparison, Gemini 1.5 Pro leads in 3 out of 5 categories (arena rank, context window, input pricing, output pricing, and parameters). Gemini 1.5 Pro excels at long documents, multimodal analysis, coding, while Claude Opus 4 is better suited for complex reasoning, coding, agentic tasks. The best choice depends on your specific requirements, budget, and use case.
How does Claude Opus 4 pricing compare to Gemini 1.5 Pro?
Claude Opus 4 charges $5.00 per 1M input tokens and $25.00 per 1M output tokens. Gemini 1.5 Pro charges $3.50 per 1M input tokens and $10.50 per 1M output tokens. Gemini 1.5 Pro is the more affordable option, approximately 2.1x cheaper on average. For high-volume production workloads, the pricing difference can significantly impact total cost of ownership.
What is the context window difference between Claude Opus 4 and Gemini 1.5 Pro?
Claude Opus 4 supports a 200K token context window, while Gemini 1.5 Pro supports 1M tokens. Gemini 1.5 Pro can process longer documents, codebases, and conversations in a single request. Context window size matters most for tasks involving long documents, large codebases, or extended conversations.
Can I use Claude Opus 4 or Gemini 1.5 Pro for free?
Claude Opus 4 is a paid API model starting at $5.00 per 1M input tokens. Gemini 1.5 Pro is a paid API model starting at $3.50 per 1M input tokens.
Which model has better benchmarks, Claude Opus 4 or Gemini 1.5 Pro?
Claude Opus 4 holds arena rank #1, while Gemini 1.5 Pro holds rank #4. Claude Opus 4 performs better in overall arena benchmarks, which aggregate human preference ratings across coding, reasoning, and general tasks. Note that benchmarks don't capture every use case — we recommend testing both models on your specific tasks.
Is Claude Opus 4 or Gemini 1.5 Pro better for coding?
Claude Opus 4 is specifically optimized for coding tasks. Gemini 1.5 Pro is specifically optimized for coding tasks. For coding specifically, arena rank and code-specific benchmarks are the best indicators of performance.