Last verified 2025-09-22 (left) · 2025-09-22 (right)
GPT-4o (fine-tuned) vs GPT-5 Chat — Pricing & Capability Comparison
GPT-4o (fine-tuned) charges $3.75 per million input tokens and $15.00 per million output tokens. GPT-5 Chat comes in at $1.25 / $10.00. Context windows span 128K vs 200K tokens respectively.
Input price (per 1M)
GPT-4o (fine-tuned)
$3.75
GPT-5 Chat
$1.25
GPT-5 Chat leads here
Output price (per 1M)
GPT-4o (fine-tuned)
$15.00
GPT-5 Chat
$10.00
GPT-5 Chat leads here
Context window
GPT-4o (fine-tuned)
128,000 tokens
GPT-5 Chat
200,000 tokens
GPT-5 Chat leads here
Cached input
GPT-4o (fine-tuned)
$1.875
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 | GPT-4o (fine-tuned) | GPT-5 Chat | GPT-4o (fine-tuned) cached | GPT-5 Chat cached |
|---|---|---|---|---|
Balanced conversation 50% input · 50% output | $0.0938 | $0.0563 | $0.0844 | $0.0506 |
Input-heavy workflow 80% input · 20% output | $0.0600 | $0.0300 | $0.0450 | $0.0210 |
Generation heavy 30% input · 70% output | $0.116 | $0.0738 | $0.111 | $0.0704 |
Cached system prompt 90% cached input · 10% fresh output | $0.0487 | $0.0212 | $0.0319 | $0.0111 |
Frequently asked questions
Which model is cheaper per million input tokens?
GPT-5 Chat costs $1.25 per million input tokens versus $3.75 for GPT-4o (fine-tuned).
How do output prices compare?
GPT-5 Chat charges $10.00 per million output tokens, while GPT-4o (fine-tuned) costs $15.00 per million.
Which model supports a larger context window?
GPT-5 Chat offers 200,000 tokens (200K) versus 128K for GPT-4o (fine-tuned).