Model Comparison
Claude Opus 4.5 vs Gemini 2.5 Pro Preview 06-05Which is better in 2026?
Claude Opus 4.5 significantly outperforms across most benchmarks. Gemini 2.5 Pro Preview 06-05 is 2.9x cheaper per token.
Verdict: Claude Opus 4.5 vs Gemini 2.5 Pro Preview 06-05 — which is better?
Claude Opus 4.5 (by Anthropic) and Gemini 2.5 Pro Preview 06-05 (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 Opus 4.5 outperforms in 2 benchmarks (GPQA, SWE-Bench Verified), while Gemini 2.5 Pro Preview 06-05 is better at 0 benchmarks. Claude Opus 4.5 significantly outperforms across most benchmarks.
On price, Gemini 2.5 Pro Preview 06-05 is roughly 2.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Gemini 2.5 Pro Preview 06-05 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Choose Claude Opus 4.5 if…
- you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
- you want the most recent training data — it shipped Nov 2025
Choose Gemini 2.5 Pro Preview 06-05 if…
- cost matters — it's about 2.9x cheaper per token
- you process long inputs — it offers a 1,048,576 token context window
Performance Benchmarks
Comparative analysis across standard metrics
Claude Opus 4.5 outperforms in 2 benchmarks (GPQA, SWE-Bench Verified), while Gemini 2.5 Pro Preview 06-05 is better at 0 benchmarks.
Claude Opus 4.5 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Opus 4.5 ($5.00/1M tokens) is 4.0x more expensive than Gemini 2.5 Pro Preview 06-05 ($1.25/1M tokens).
For output processing, Claude Opus 4.5 ($25.00/1M tokens) is 2.5x more expensive than Gemini 2.5 Pro Preview 06-05 ($10.00/1M tokens).
In conclusion, Claude Opus 4.5 is more expensive than Gemini 2.5 Pro Preview 06-05.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Gemini 2.5 Pro Preview 06-05 accepts 1,048,576 input tokens compared to Claude Opus 4.5's 200,000 tokens. Gemini 2.5 Pro Preview 06-05 can generate longer responses up to 65,535 tokens, while Claude Opus 4.5 is limited to 64,000 tokens.
Input Capabilities
Supported data types and modalities
Both Claude Opus 4.5 and Gemini 2.5 Pro Preview 06-05 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Opus 4.5
Gemini 2.5 Pro Preview 06-05
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Claude Opus 4.5 was released on 2025-11-24, while Gemini 2.5 Pro Preview 06-05 was released on 2025-06-05.
Claude Opus 4.5 is 6 months newer than Gemini 2.5 Pro Preview 06-05.
Nov 24, 2025
6 months ago
5mo newerJun 5, 2025
1.0 years ago
Knowledge Cutoff
When training data ends
Claude Opus 4.5 has a knowledge cutoff of 2025-03-31, while Gemini 2.5 Pro Preview 06-05 has a cutoff of 2025-01-31.
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 2.5 Pro Preview 06-05 (2025-01-31).
Mar 2025
2 mo newerJan 2025
Provider Availability
Claude Opus 4.5 is available from Anthropic. Gemini 2.5 Pro Preview 06-05 is available from Google.
Claude Opus 4.5
Gemini 2.5 Pro Preview 06-05
Outputs Comparison
Key Takeaways
Claude Opus 4.5
View detailsAnthropic
Detailed Comparison
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FAQ
Common questions about Claude Opus 4.5 vs Gemini 2.5 Pro Preview 06-05.