Last verified 2025-09-22 (left) · 2025-09-22 (right)
Claude Sonnet 3.7 (Legacy) vs Gemini 2.5 Flash — Pricing & Capability Comparison
Claude Sonnet 3.7 (Legacy) charges $3.00 per million input tokens and $15.00 per million output tokens. Gemini 2.5 Flash comes in at $0.30 / $2.50. Context windows span 200K vs 1M tokens respectively.
Input price (per 1M)
Claude Sonnet 3.7 (Legacy)
$3.00
Gemini 2.5 Flash
$0.30
Gemini 2.5 Flash leads here
Output price (per 1M)
Claude Sonnet 3.7 (Legacy)
$15.00
Gemini 2.5 Flash
$2.50
Gemini 2.5 Flash leads here
Context window
Claude Sonnet 3.7 (Legacy)
200,000 tokens
Gemini 2.5 Flash
1,000,000 tokens
Gemini 2.5 Flash leads here
Cached input
Claude Sonnet 3.7 (Legacy)
Not published
Gemini 2.5 Flash
Not published
No published data
Cost comparison for 10K-token workloads
Side-by-side pricing for identical workloads (10,000 total tokens per request) across different distributions.
| Scenario | Claude Sonnet 3.7 (Legacy) | Gemini 2.5 Flash |
|---|---|---|
Balanced conversation 50% input · 50% output | $0.0900 | $0.0140 |
Input-heavy workflow 80% input · 20% output | $0.0540 | $0.0074 |
Generation heavy 30% input · 70% output | $0.114 | $0.0184 |
Cached system prompt 90% cached input · 10% fresh output | $0.0420 | $0.0052 |
Frequently asked questions
Which model is cheaper per million input tokens?
Gemini 2.5 Flash costs $0.30 per million input tokens versus $3.00 for Claude Sonnet 3.7 (Legacy).
How do output prices compare?
Gemini 2.5 Flash charges $2.50 per million output tokens, while Claude Sonnet 3.7 (Legacy) costs $15.00 per million.
Which model supports a larger context window?
Gemini 2.5 Flash offers 1,000,000 tokens (1M) versus 200K for Claude Sonnet 3.7 (Legacy).