Gemini 2.5 Flash vs GPT-5.4
Pricing, benchmarks, and use case comparison
Quick take
- •Gemini 2.5 Flash is meaningfully stronger at speed (90 vs 66 on our capability index).
- •GPT-5.4 is meaningfully stronger at coding (88 vs 75).
- •Gemini 2.5 Flash is 88% cheaper on input tokens, which compounds fast on high-volume or agentic workloads.
Specs comparison
| Gemini 2.5 Flash | GPT-5.4 | |
|---|---|---|
| Provider | Google DeepMind | OpenAI |
| Type | Closed source | Closed source |
| Context window | 1,048,576 tokens (1M) input; up to 65,535 output | 1,050,000 tokens (128,000 max output) |
| Input / 1M tokens | ✓$0.30 | $2.50 |
| Output / 1M tokens | $2.50 | $15.00 |
| Release date | 2025-06 | 2026-03 |
Benchmarks
| Benchmark | Gemini 2.5 Flash | GPT-5.4 |
|---|---|---|
| Context window | 1M tokens | - |
| Input price | $0.30/1M | - |
Scores sourced from official provider release posts and independent benchmark aggregators.
Which should you choose?
Choose Gemini 2.5 Flash if...
- →High-volume, latency-sensitive production workloads
- →Chatbots, extraction, classification, and summarization at scale
- →You need decent reasoning but must control costs
Choose GPT-5.4 if...
- →Large-context tasks where GPT-5.5-level frontier reasoning is not required
- →Cost-conscious production workloads that still need strong capability
- →Migrating from GPT-5.4-based systems where behavior is already tuned