Gemini 2.5 Pro vs GPT-4o
API pricing, context window and capabilities for Gemini 2.5 Pro and GPT-4o, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.
Verdict
computed from the published numbersGemini 2.5 Pro wins on price, on intelligence and on context window. Benchmark data is unavailable for one or both models.
Price
Gemini 2.5 Pro
Terminal-Bench
Not called
Intelligence
Gemini 2.5 Pro
Context window
Gemini 2.5 Pro
Key takeaways
who wins on what, from the published numbersGemini 2.5 Pro wins
- Cheaper input ($1.25 vs $2.50 /1M)
- Larger context window (1M vs 131K)
- Higher max output (1M vs 16K)
- More serving providers (7 vs 6)
- Has reasoning mode
- Has web search
GPT-4o wins
No clear edge on the tracked metrics.
Cheaper overall
Gemini 2.5 Pro
$1.25 + $10.00 /1M
Larger context
Gemini 2.5 Pro
1M
More providers
Gemini 2.5 Pro
7 providers
Pricing & specs
cheapest listed route · per 1M tokensOn-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower.
| Gemini 2.5 Pro | GPT-4o | |
|---|---|---|
| Input $/1M | $1.25via Databricks best | $2.50via OpenAI |
| Output $/1M | $10.00via Databricks | $10.00via OpenAI |
| Context window | 1M best | 131K |
| Max output | 1M best | 16K |
| Serving providers | 7 best | 6 |
| Date | Released Jun 17, 2025 | Released May 13, 2024 |
Benchmarks
Benchmark scores, side by side| Gemini 2.5 Pro | GPT-4o | |
|---|---|---|
| Intelligence | 16.1 best | 8.4 |
| Terminal-Bench | 28% | Not available |
| GPQA Diamond | 84% best | 54% |
| Output speed | 115 t/s | 150 t/s best |
| Latency (TTFT) | 23.38s | 0.79s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Gemini 2.5 Pro
via Databricks
$16
GPT-4o
via Gmi
$23
Capabilities
feature support, side by side| Feature | Gemini 2.5 Pro | GPT-4o |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | — |
| Audio | ✓ | ✓ |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | ✓ | — |
Related comparisons
Frequently asked questions
Which is cheaper, Gemini 2.5 Pro or GPT-4o?
Gemini 2.5 Pro is cheaper for input ($1.25 vs $2.50 per 1M tokens) from Databricks.
What is the context window difference between Gemini 2.5 Pro and GPT-4o?
Gemini 2.5 Pro has a 1M-token context window and GPT-4o has 131K tokens, so Gemini 2.5 Pro can take a larger prompt.
How do Gemini 2.5 Pro and GPT-4o compare on benchmarks?
On the tracked benchmarks, Gemini 2.5 Pro leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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