Last verified 2025-09-22 (left) · 2025-09-22 (right)
Claude Sonnet 3.7 (Legacy) vs GPT-4o (fine-tuned) — Pricing & Capability Comparison
Claude Sonnet 3.7 (Legacy) charges $3.00 per million input tokens and $15.00 per million output tokens. GPT-4o (fine-tuned) comes in at $3.75 / $15.00. Context windows span 200K vs 128K tokens respectively.
Input price (per 1M)
Claude Sonnet 3.7 (Legacy)
$3.00
GPT-4o (fine-tuned)
$3.75
Claude Sonnet 3.7 (Legacy) leads here
Output price (per 1M)
Claude Sonnet 3.7 (Legacy)
$15.00
GPT-4o (fine-tuned)
$15.00
Claude Sonnet 3.7 (Legacy) leads here
Context window
Claude Sonnet 3.7 (Legacy)
200,000 tokens
GPT-4o (fine-tuned)
128,000 tokens
Claude Sonnet 3.7 (Legacy) leads here
Cached input
Claude Sonnet 3.7 (Legacy)
Not published
GPT-4o (fine-tuned)
$1.875
GPT-4o (fine-tuned) 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-4o (fine-tuned) | GPT-4o (fine-tuned) cached |
|---|---|---|---|
Balanced conversation 50% input · 50% output | $0.0900 | $0.0938 | $0.0844 |
Input-heavy workflow 80% input · 20% output | $0.0540 | $0.0600 | $0.0450 |
Generation heavy 30% input · 70% output | $0.114 | $0.116 | $0.111 |
Cached system prompt 90% cached input · 10% fresh output | $0.0420 | $0.0487 | $0.0319 |
Frequently asked questions
Which model is cheaper per million input tokens?
Claude Sonnet 3.7 (Legacy) costs $3.00 per million input tokens versus $3.75 for GPT-4o (fine-tuned).
How do output prices compare?
Claude Sonnet 3.7 (Legacy) charges $15.00 per million output tokens, while GPT-4o (fine-tuned) costs $15.00 per million.
Which model supports a larger context window?
Claude Sonnet 3.7 (Legacy) offers 200,000 tokens (200K) versus 128K for GPT-4o (fine-tuned).