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Gemini 2.5 Flash

VS
OpenAI

GPT-5.4 mini

✍️ Analysis by:the whichllmmodel Editorial Team|📅 Updated: June 2026

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, GPT-5.4 mini is the premium intelligence choice, scoring 54.4% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: Gemini 2.5 Flash is 2.0x cheaper to run and delivers 1.1x faster throughput. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, Gemini 2.5 Flash offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of GPT-5.4 mini fully justifies the cost.

Model Specs

Gemini 2.5 Flash

Benchmarks & Scores

Coding (swe-bench-pro)
N/A
Reasoning (gpqa-diamond)
68.3%

Cost & Performance

Cost (per 1M tokens)2.0x cheaper
$0.85Input: $0.30 | Output: $2.50
Speed1.1x faster
221 tps
Context WindowLarger
1M tokens
Model Specs

GPT-5.4 mini

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+)
54.4%
Reasoning (gpqa-diamond)Winner (+19.2%)
87.5%

Cost & Performance

Cost (per 1M tokens)
$1.69Input: $0.75 | Output: $4.50
Speed
201 tps
Context Window
400k tokens
Read our data collection methodology

Frequently Asked Questions

Gemini 2.5 Flash is cheaper than GPT-5.4 mini. Gemini 2.5 Flash has a blended cost of $0.85/1M tokens, which is about 2.0x cheaper than GPT-5.4 mini at $1.69/1M tokens.

Gemini 2.5 Flash is faster than GPT-5.4 mini. Gemini 2.5 Flash generates 221 tokens per second (tps) compared to GPT-5.4 mini which generates 201 tokens per second.

GPT-5.4 mini is better for coding tasks. It scores 54.4% on coding evaluations (swe-bench-pro) compared to Gemini 2.5 Flash which scores N/A.

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