GPT-6.1 Sol vs Gemini 2.5 Pro: API cost
Standard, cached and batch API prices for GPT-6.1 Sol (OpenAI) and Gemini 2.5 Pro (Google), and what each costs for your usage.
Gemini 2.5 Pro is cheaper than GPT-6.1 Sol at standard rates, with 38% cheaper input and the same output price. Cached input is the exception: GPT-6.1 Sol’s is 20% cheaper, so heavy caching narrows the gap and can reverse it.
- Input $60.00
- Cached input $3.00
- Output $90.00
- Input $37.50
- Cached input $3.75
- Output $90.00
Show as a table
| Output tokens | GPT-6.1 Sol | Gemini 2.5 Pro |
|---|---|---|
| 0 | $2.00 | $1.25 |
| 250 | $4.50 | $3.75 |
| 500 | $7.00 | $6.25 |
| 750 | $9.50 | $8.75 |
| 1,000 | $12.00 | $11.25 |
| Token type | GPT-6.1 Sol | Gemini 2.5 Pro | |
|---|---|---|---|
| Input | $2 | $1.25 | Gemini 2.5 Pro is 38% cheaper |
| Cached input | $0.10 | $0.125 | GPT-6.1 Sol is 20% cheaper |
| Output | $10 | $10 | Same price |
| Batch input | $1 | $0.625 | Gemini 2.5 Pro is 38% cheaper |
| Batch cached input | $0.05 | $0.125 | GPT-6.1 Sol is 2.5× cheaper |
| Batch output | $5 | $5 | Same price |
GPT-6.1 Sol: Long prompts are billed at higher long-context rates.
Gemini 2.5 Pro: Prompts over 200K tokens are billed at a higher rate.
| Workload | GPT-6.1 Sol | Gemini 2.5 Pro |
|---|---|---|
Support chatbot 2,000 in / 300 out tokens,
1,000 requests a day, 50% cached | $153.00 | $131.25 |
Document summaries 10,000 in / 800 out tokens,
200 requests a day | $168.00 | $123.00 |
Tagging / classifying 400 in / 20 out tokens,
20,000 requests a day | $600.00 | $420.00 |
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- GPT-6.1 Sol vs Gemini 3.1 Pro Preview
Or see GPT-6.1 Sol pricing, Gemini 2.5 Pro pricing, or compare any two models.
FAQ
Frequently asked questions
Is GPT-6.1 Sol cheaper than Gemini 2.5 Pro?
Gemini 2.5 Pro is cheaper than GPT-6.1 Sol at standard rates, with 38% cheaper input and the same output price. Cached input is the exception: GPT-6.1 Sol’s is 20% cheaper, so heavy caching narrows the gap and can reverse it. Based on standard API rates last checked on Oct 13, 2026.
How much do GPT-6.1 Sol and Gemini 2.5 Pro cost per million tokens?
GPT-6.1 Sol: $2 per million input tokens and $10 per million output tokens. Gemini 2.5 Pro: $1.25 input and $10 output. These are standard rates in USD, before tax, from each provider’s own pricing page.
Which is cheaper with the Batch API?
GPT-6.1 Sol’s batch rates are $1 input and $5 output per million tokens (50% off); Gemini 2.5 Pro’s batch rates are $0.625 input and $5 output per million tokens (50% off).
Does prompt caching change the comparison?
GPT-6.1 Sol charges $0.10 per million cached input tokens, against $2 for normal input; Gemini 2.5 Pro charges $0.125 per million cached input tokens, against $1.25 for normal input. Cache write and storage charges are extra and aren’t included here.