Comparison · 2026-05-12
GPT-5 vs Gemini 2.5 Pro
Side-by-side comparison of pricing, context window and capabilities for GPT-5 (OpenAI) and Gemini 2.5 Pro (Google). Focus: flagship.
| GPT-5 | Gemini 2.5 Pro | |
|---|---|---|
| Vendor | OpenAI | |
| Input price / 1M tokens | $1.25 | $1.25 |
| Output price / 1M tokens | $10.00 | $10.00 |
| Total per 1M (in + out) | $11.25 | $11.25 |
| Context window | 400K | 1.05M |
| Max output tokens | 128K | 66K |
| Tool calling | ✓ Yes | ✓ Yes |
| Structured output | ✓ Yes | ✓ Yes |
| Reasoning | ✓ Yes | ✓ Yes |
| Vision input | ✓ Yes | ✓ Yes |
| Open weights | ✗ No | ✗ No |
| Provider availability | 20 providers | 22 providers |
| Release date | 2025-08-07 | 2025-03-20 |
| Knowledge cutoff | 2024-09-30 | 2025-01 |
Quick takeaway
- Gemini 2.5 Pro has a larger context window (1.05M vs 400K).
- Gemini 2.5 Pro is more widely available across providers (22 vs 20).
Last updated:
Prices in USD per 1M tokens. Unknown means the provider does not publish per-token pricing.
Data is sourced from models.dev and normalized for comparison. Prices and capabilities may change. Always verify critical production decisions with the provider's official documentation.