Claude Sonnet 5.5 vs Gemini 2.5 Pro: API cost
Standard, cached and batch API prices for Claude Sonnet 5.5 (Anthropic) and Gemini 2.5 Pro (Google), and what each costs for your usage.
Gemini 2.5 Pro is cheaper than Claude Sonnet 5.5 at standard rates, with 38% cheaper input and the same output price. Cached input is the exception: Claude Sonnet 5.5’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 | Claude Sonnet 5.5 | 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 | Claude Sonnet 5.5 | Gemini 2.5 Pro | |
|---|---|---|---|
| Input | $2 | $1.25 | Gemini 2.5 Pro is 38% cheaper |
| Cached input | $0.10 | $0.125 | Claude Sonnet 5.5 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 | Claude Sonnet 5.5 is 2.5× cheaper |
| Batch output | $5 | $5 | Same price |
Gemini 2.5 Pro: Prompts over 200K tokens are billed at a higher rate.
| Workload | Claude Sonnet 5.5 | 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 |
More comparisons
- GPT-6.1 Sol vs Claude Sonnet 5.5
- GPT-6.1 Sol vs Gemini 2.5 Pro
- Claude Opus 5.5 vs Claude Sonnet 5.5
- Claude Sonnet 5.5 vs Claude Haiku 4.5
- Claude Sonnet 5.5 vs Gemini 3.5 Flash
- Claude Sonnet 5.5 vs Gemini 3.1 Pro Preview
- Gemini 3 Flash Preview vs Gemini 2.5 Pro
- Gemini 2.5 Pro vs Gemini 2.5 Flash
Or see Claude Sonnet 5.5 pricing, Gemini 2.5 Pro pricing, or compare any two models.
FAQ
Frequently asked questions
Is Claude Sonnet 5.5 cheaper than Gemini 2.5 Pro?
Gemini 2.5 Pro is cheaper than Claude Sonnet 5.5 at standard rates, with 38% cheaper input and the same output price. Cached input is the exception: Claude Sonnet 5.5’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 Claude Sonnet 5.5 and Gemini 2.5 Pro cost per million tokens?
Claude Sonnet 5.5: $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?
Claude Sonnet 5.5’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?
Claude Sonnet 5.5 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.