GPT-4 Turbo vs Gemini 1.5 Flash

Performance benchmarks + pricing comparison — updated April 2026

GPT-4 Turbo

OpenAI

Previous generation high-performance model. Good for complex reasoning tasks.

Input$10.00/M
Output$30.00/M
Context128K tokens
Best ForComplex reasoning, data extraction, analysis
Benchmark70/100

Gemini 1.5 Flash

Google

Cheapest Gemini model. Good for high-volume, simple tasks.

Input$0.075/M
Output$0.300/M
Context1M tokens
Best ForHigh-volume simple tasks, cost optimization

Cost Comparison by Scenario

Estimated cost per project with 30% cache hit rate. Actual costs may vary based on usage patterns.

ScenarioGPT-4 TurboGemini 1.5 FlashSavings
Small Script (1K lines) $1.25 $0.01 Gemini 1.5 Flash saves $1.24 (99%)
Medium Feature (10K lines) $9.50 $0.09 Gemini 1.5 Flash saves $9.41 (99%)
Large Project (50K lines) $47.50 $0.43 Gemini 1.5 Flash saves $47.07 (99%)
Code Review (5K lines) $2.50 $0.02 Gemini 1.5 Flash saves $2.48 (99%)

Verdict

Gemini 1.5 Flash wins on both price and performance — $0.075/M input with a benchmark score of N/A/100.

For most developers, this is the clear choice between these two models.

Compare with Other Models