Last verified 2025-09-22 (left) · 2025-09-22 (right)
Gemini 2.5 Flash vs Grok 4 — Pricing & Capability Comparison
Gemini 2.5 Flash charges $0.30 per million input tokens and $2.50 per million output tokens. Grok 4 comes in at $3.00 / $15.00. Context windows span 1M vs 256K tokens respectively.
Input price (per 1M)
Gemini 2.5 Flash
$0.30
Grok 4
$3.00
Gemini 2.5 Flash leads here
Output price (per 1M)
Gemini 2.5 Flash
$2.50
Grok 4
$15.00
Gemini 2.5 Flash leads here
Context window
Gemini 2.5 Flash
1,000,000 tokens
Grok 4
256,000 tokens
Gemini 2.5 Flash leads here
Cached input
Gemini 2.5 Flash
Not published
Grok 4
$0.750
Grok 4 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 | Grok 4 | Grok 4 cached |
|---|---|---|---|
Balanced conversation 50% input · 50% output | $0.0140 | $0.0900 | $0.0788 |
Input-heavy workflow 80% input · 20% output | $0.0074 | $0.0540 | $0.0360 |
Generation heavy 30% input · 70% output | $0.0184 | $0.114 | $0.107 |
Cached system prompt 90% cached input · 10% fresh output | $0.0052 | $0.0420 | $0.0217 |
Frequently asked questions
Which model is cheaper per million input tokens?
Gemini 2.5 Flash costs $0.30 per million input tokens versus $3.00 for Grok 4.
How do output prices compare?
Gemini 2.5 Flash charges $2.50 per million output tokens, while Grok 4 costs $15.00 per million.
Which model supports a larger context window?
Gemini 2.5 Flash offers 1,000,000 tokens (1M) versus 256K for Grok 4.