GPT-4o vs Gemini 2.5 Pro
GPT-4o and Gemini 2.5 Pro represent the flagship models from OpenAI and Google respectively. Gemini dominates on reasoning benchmarks and offers a 1M context window at half the price, while GPT-4o brings native audio capabilities and the broadest ecosystem support. Both are strong general-purpose models with different strengths.
Head-to-Head Specs
| Spec | GPT-4o | Gemini 2.5 Pro |
|---|---|---|
| Provider | OpenAI | |
| Input Price | $2.50/1M | $1.25/1M |
| Output Price | $10.00/1M | $10.00/1M |
| Context Window | 128K | 1M |
| Released | 2024-05 | 2025-03 |
| Capabilities | text, vision, tool-use, code | text, vision, tool-use, code, reasoning |
Benchmark Scores
| Benchmark | GPT-4o | Gemini 2.5 Pro | Winner |
|---|---|---|---|
| MMLU-Pro | 87.2 | 91.2 | Gemini |
| HumanEval | 90.2 | 93.8 | Gemini |
| GPQA Diamond | 59.1 | 71.9 | Gemini |
| MATH | 81.3 | 90.5 | Gemini |
| SWE-bench | 48.5 | 59.4 | Gemini |
See the full benchmark leaderboard for all models.
Category Breakdown
Gemini scores 91.2 on MMLU-Pro vs GPT-4o at 87.2
Gemini leads on HumanEval (93.8 vs 90.2)
1M tokens vs 128K tokens
Gemini costs $1.25/$10 vs GPT-4o at $2.50/$10 per 1M tokens
GPT-4o supports native audio; Gemini is text, vision, and video
Broader third-party integrations and developer tools
Choose GPT-4o when:
- ▸Audio-based applications
- ▸Existing OpenAI ecosystem integration
- ▸Plugin and tool marketplace access
- ▸Established enterprise partnerships
Choose Gemini 2.5 Pro when:
- ▸Processing very long documents (1M context)
- ▸Better reasoning performance per dollar
- ▸Google Cloud and Vertex AI integration
- ▸Video understanding workloads
Frequently Asked Questions
Which is better, GPT-4o or Gemini 2.5 Pro?
It depends on your use case. GPT-4o from OpenAI excels at audio-based applications, while Gemini 2.5 Pro from Google is better for processing very long documents (1m context). See the full comparison above for detailed benchmarks and pricing.
How much does GPT-4o cost compared to Gemini 2.5 Pro?
GPT-4o costs $2.50 input and $10.00 output per 1M tokens. Gemini 2.5 Pro costs $1.25 input and $10.00 output per 1M tokens.
What is the context window difference between GPT-4o and Gemini 2.5 Pro?
GPT-4o supports 128K tokens, while Gemini 2.5 Pro supports 1M tokens.