Gemini 2.5 Pro vs GPT-5
2026 - Pricing, benchmarks, and use case comparison
Quick take
- •Gemini 2.5 Pro is 88% cheaper on input tokens - better for high-volume workloads.
- •Gemini 2.5 Pro has a 1M context window - 8x larger than GPT-5's 128K. Better for long documents and large codebases.
Specs comparison
| Gemini 2.5 Pro | GPT-5 | |
|---|---|---|
| Provider | Google DeepMind | OpenAI |
| Type | Closed source | Closed source |
| Context window | ✓1M | 128K |
| Input / 1M tokens | ✓$1.25 | $10.00 |
| Output / 1M tokens | $10.00 | $30.00 |
| Release date | 2025-03 | 2025-06 |
Benchmarks
| Benchmark | Gemini 2.5 Pro | GPT-5 |
|---|---|---|
| GPQA Diamond | 86.4% | - |
| MMLU | 90.9% | - |
| SWE-bench Verified | 63.2% | - |
Scores sourced from official provider release posts.
Strengths
Gemini 2.5 Pro
- ✓Largest commercial context window (1M tokens)
- ✓Top benchmark scores on science and math
- ✓Strong multimodal: video, audio, images
- ✓Competitive pricing for the capability tier
- ✓Native Google Search and code execution tools
GPT-5
- ✓Strong general-purpose reasoning
- ✓Excellent multimodal understanding
- ✓Broad domain knowledge
- ✓Consistent instruction following
- ✓Widely supported by third-party tools
Which should you choose?
Choose Gemini 2.5 Pro if you need...
- →Very long document analysis
- →Video and multimodal understanding
- →Scientific research tasks
- →Large codebase comprehension
Choose GPT-5 if you need...
- →General-purpose API integrations
- →Multimodal applications
- →Complex reasoning tasks
- →Enterprise deployments