Last verified 2025-09-22 (left) · 2025-09-22 (right)
Claude Sonnet 4 vs GPT-4o (fine-tuned) — Pricing & Capability Comparison
Claude Sonnet 4 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 4
$3.00
GPT-4o (fine-tuned)
$3.75
Claude Sonnet 4 leads here
Output price (per 1M)
Claude Sonnet 4
$15.00
GPT-4o (fine-tuned)
$15.00
Claude Sonnet 4 leads here
Context window
Claude Sonnet 4
200,000 tokens
GPT-4o (fine-tuned)
128,000 tokens
Claude Sonnet 4 leads here
Cached input
Claude Sonnet 4
$0.300
GPT-4o (fine-tuned)
$1.875
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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 4 | GPT-4o (fine-tuned) | Claude Sonnet 4 cached | GPT-4o (fine-tuned) cached |
|---|---|---|---|---|
Balanced conversation 50% input · 50% output | $0.0900 | $0.0938 | $0.0765 | $0.0844 |
Input-heavy workflow 80% input · 20% output | $0.0540 | $0.0600 | $0.0324 | $0.0450 |
Generation heavy 30% input · 70% output | $0.114 | $0.116 | $0.106 | $0.111 |
Cached system prompt 90% cached input · 10% fresh output | $0.0420 | $0.0487 | $0.0177 | $0.0319 |
Frequently asked questions
Which model is cheaper per million input tokens?
Claude Sonnet 4 costs $3.00 per million input tokens versus $3.75 for GPT-4o (fine-tuned).
How do output prices compare?
Claude Sonnet 4 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 4 offers 200,000 tokens (200K) versus 128K for GPT-4o (fine-tuned).