Model Comparison
GPT-5.4 vs Gemini 2.5 Pro Preview 06-05Which is better in 2026?
GPT-5.4 significantly outperforms across most benchmarks. Gemini 2.5 Pro Preview 06-05 is 1.6x cheaper per token.
Verdict: GPT-5.4 vs Gemini 2.5 Pro Preview 06-05 — which is better?
GPT-5.4 (by OpenAI) 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.
GPT-5.4 outperforms in 2 benchmarks (GPQA, Humanity's Last Exam), while Gemini 2.5 Pro Preview 06-05 is better at 0 benchmarks. GPT-5.4 significantly outperforms across most benchmarks.
On price, Gemini 2.5 Pro Preview 06-05 is roughly 1.6x 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 GPT-5.4 if…
- you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
- you want the most recent training data — it shipped Mar 2026
Choose Gemini 2.5 Pro Preview 06-05 if…
- cost matters — it's about 1.6x cheaper per token
- you process long inputs — it offers a 1,048,576 token context window
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.4 outperforms in 2 benchmarks (GPQA, Humanity's Last Exam), while Gemini 2.5 Pro Preview 06-05 is better at 0 benchmarks.
GPT-5.4 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.4 ($2.50/1M tokens) is 2.0x more expensive than Gemini 2.5 Pro Preview 06-05 ($1.25/1M tokens).
For output processing, GPT-5.4 ($15.00/1M tokens) is 1.5x more expensive than Gemini 2.5 Pro Preview 06-05 ($10.00/1M tokens).
In conclusion, GPT-5.4 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 GPT-5.4's 1,000,000 tokens. GPT-5.4 can generate longer responses up to 128,000 tokens, while Gemini 2.5 Pro Preview 06-05 is limited to 65,535 tokens.
Input Capabilities
Supported data types and modalities
Both GPT-5.4 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.
GPT-5.4
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
GPT-5.4 was released on 2026-03-05, while Gemini 2.5 Pro Preview 06-05 was released on 2025-06-05.
GPT-5.4 is 9 months newer than Gemini 2.5 Pro Preview 06-05.
Mar 5, 2026
3 months ago
9mo newerJun 5, 2025
1.0 years ago
Knowledge Cutoff
When training data ends
Gemini 2.5 Pro Preview 06-05 has a documented knowledge cutoff of 2025-01-31, while GPT-5.4's cutoff date is not specified.
We can confirm Gemini 2.5 Pro Preview 06-05's training data extends to 2025-01-31, but cannot make a direct comparison without GPT-5.4's cutoff date.
—
Jan 2025
Provider Availability
GPT-5.4 is available from OpenAI. Gemini 2.5 Pro Preview 06-05 is available from Google.
GPT-5.4
Gemini 2.5 Pro Preview 06-05
Outputs Comparison
Key Takeaways
GPT-5.4
View detailsOpenAI
Detailed Comparison
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FAQ
Common questions about GPT-5.4 vs Gemini 2.5 Pro Preview 06-05.