Model Comparison
Gemini 2.5 Pro Preview 06-05 vs Grok 4.5Which is better in 2026?
Grok 4.5 significantly outperforms across most benchmarks. Grok 4.5 is 1.1x cheaper per token.
Verdict: Gemini 2.5 Pro Preview 06-05 vs Grok 4.5 — which is better?
Gemini 2.5 Pro Preview 06-05 (by Google) and Grok 4.5 (by xAI) 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 2.5 Pro Preview 06-05 outperforms in 0 benchmarks, while Grok 4.5 is better at 1 benchmark (GPQA). Grok 4.5 significantly outperforms across most benchmarks.
On price, Grok 4.5 is roughly 1.1x 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 Gemini 2.5 Pro Preview 06-05 if…
- you process long inputs — it offers a 1,048,576 token context window
Choose Grok 4.5 if…
- you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
- cost matters — it's about 1.1x cheaper per token
- you want the most recent training data — it shipped Jul 2026
Performance Benchmarks
Comparative analysis across standard metrics
Gemini 2.5 Pro Preview 06-05 outperforms in 0 benchmarks, while Grok 4.5 is better at 1 benchmark (GPQA).
Grok 4.5 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 2.5 Pro Preview 06-05 ($1.25/1M tokens) is 1.6x cheaper than Grok 4.5 ($2.00/1M tokens).
For output processing, Gemini 2.5 Pro Preview 06-05 ($10.00/1M tokens) is 1.7x more expensive than Grok 4.5 ($6.00/1M tokens).
In conclusion, Gemini 2.5 Pro Preview 06-05 is more expensive than Grok 4.5.*
* 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 Grok 4.5's 500,000 tokens. Only Gemini 2.5 Pro Preview 06-05 specifies output context (65,535 tokens).
Input Capabilities
Supported data types and modalities
Both Gemini 2.5 Pro Preview 06-05 and Grok 4.5 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Gemini 2.5 Pro Preview 06-05
Grok 4.5
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
Gemini 2.5 Pro Preview 06-05 was released on 2025-06-05, while Grok 4.5 was released on 2026-07-16.
Grok 4.5 is 14 months newer than Gemini 2.5 Pro Preview 06-05.
Jun 5, 2025
1.1 years ago
Jul 16, 2026
5 days ago
1.1yr newerKnowledge Cutoff
When training data ends
Gemini 2.5 Pro Preview 06-05 has a knowledge cutoff of 2025-01-31, while Grok 4.5 has a cutoff of 2026-02-01.
Grok 4.5 has more recent training data (up to 2026-02-01), making it potentially better informed about events through that date compared to Gemini 2.5 Pro Preview 06-05 (2025-01-31).
Jan 2025
Feb 2026
1.1 yr newerProvider Availability
Gemini 2.5 Pro Preview 06-05 is available from Google. Grok 4.5 is available from xAI.
Gemini 2.5 Pro Preview 06-05
Grok 4.5
Outputs Comparison
Key Takeaways
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against Gemini 2.5 Pro Preview 06-05 and Grok 4.5 side-by-side, then vote on the output you prefer.
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FAQ
Common questions about Gemini 2.5 Pro Preview 06-05 vs Grok 4.5.