Last verified 2025-09-22 (left) · 2025-09-22 (right)
Claude Sonnet 3.7 (Legacy) vs GPT-5 Chat — Pricing & Capability Comparison
Claude Sonnet 3.7 (Legacy) charges $3.00 per million input tokens and $15.00 per million output tokens. GPT-5 Chat comes in at $1.25 / $10.00. Context windows span 200K vs 200K tokens respectively.
Input price (per 1M)
Claude Sonnet 3.7 (Legacy)
$3.00
GPT-5 Chat
$1.25
GPT-5 Chat leads here
Output price (per 1M)
Claude Sonnet 3.7 (Legacy)
$15.00
GPT-5 Chat
$10.00
GPT-5 Chat leads here
Context window
Claude Sonnet 3.7 (Legacy)
200,000 tokens
GPT-5 Chat
200,000 tokens
Claude Sonnet 3.7 (Legacy) leads here
Cached input
Claude Sonnet 3.7 (Legacy)
Not published
GPT-5 Chat
$0.125
GPT-5 Chat leads here
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) | GPT-5 Chat | GPT-5 Chat cached |
|---|---|---|---|
Balanced conversation 50% input · 50% output | $0.0900 | $0.0563 | $0.0506 |
Input-heavy workflow 80% input · 20% output | $0.0540 | $0.0300 | $0.0210 |
Generation heavy 30% input · 70% output | $0.114 | $0.0738 | $0.0704 |
Cached system prompt 90% cached input · 10% fresh output | $0.0420 | $0.0212 | $0.0111 |
Frequently asked questions
Which model is cheaper per million input tokens?
GPT-5 Chat costs $1.25 per million input tokens versus $3.00 for Claude Sonnet 3.7 (Legacy).
How do output prices compare?
GPT-5 Chat charges $10.00 per million output tokens, while Claude Sonnet 3.7 (Legacy) costs $15.00 per million.
Which model supports a larger context window?
Claude Sonnet 3.7 (Legacy) offers 200,000 tokens (200K) versus 200K for GPT-5 Chat.