Last verified 2025-09-22 (left) · 2025-09-22 (right)
Gemini 2.5 Flash vs GPT-4o (fine-tuned) — Pricing & Capability Comparison
Gemini 2.5 Flash charges $0.30 per million input tokens and $2.50 per million output tokens. GPT-4o (fine-tuned) comes in at $3.75 / $15.00. Context windows span 1M vs 128K tokens respectively.
Input price (per 1M)
Gemini 2.5 Flash
$0.30
GPT-4o (fine-tuned)
$3.75
Gemini 2.5 Flash leads here
Output price (per 1M)
Gemini 2.5 Flash
$2.50
GPT-4o (fine-tuned)
$15.00
Gemini 2.5 Flash leads here
Context window
Gemini 2.5 Flash
1,000,000 tokens
GPT-4o (fine-tuned)
128,000 tokens
Gemini 2.5 Flash leads here
Cached input
Gemini 2.5 Flash
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 | Gemini 2.5 Flash | GPT-4o (fine-tuned) | GPT-4o (fine-tuned) cached |
|---|---|---|---|
Balanced conversation 50% input · 50% output | $0.0140 | $0.0938 | $0.0844 |
Input-heavy workflow 80% input · 20% output | $0.0074 | $0.0600 | $0.0450 |
Generation heavy 30% input · 70% output | $0.0184 | $0.116 | $0.111 |
Cached system prompt 90% cached input · 10% fresh output | $0.0052 | $0.0487 | $0.0319 |
Frequently asked questions
Which model is cheaper per million input tokens?
Gemini 2.5 Flash costs $0.30 per million input tokens versus $3.75 for GPT-4o (fine-tuned).
How do output prices compare?
Gemini 2.5 Flash charges $2.50 per million output tokens, while GPT-4o (fine-tuned) costs $15.00 per million.
Which model supports a larger context window?
Gemini 2.5 Flash offers 1,000,000 tokens (1M) versus 128K for GPT-4o (fine-tuned).