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GPT-3.5 Turbo vs Gemini 2.5 Flash

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OpenAI · 16k context | Google · 1M context

Pricing Comparison

Metric	GPT-3.5 Turbo	Gemini 2.5 Flash
Input / 1M tokens	$0.5	$0.3
Output / 1M tokens	$1.5	$2.5
Cached input / 1M	—	$0.075
Context window	16k	1M
Provider	OpenAI	Google

Cost Calculator

Input tokens

Output tokens

Requests/day

💰 GPT-3.5 Turbo saves $90.00/month (19% cheaper)

OGPT-3.5 TurboCHEAPER

Per request$0.001250

Daily$12.50

Monthly$375.00

Yearly$4,562.50

GGemini 2.5 Flash

Per request$0.001550

Daily$15.50

Monthly$465.00

Yearly$5,657.50

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Choose GPT-3.5 Turbo when…

✓ Cheaper for generation-heavy workloads (lower output cost)
✓ Optimized for: Legacy chat applications

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Choose Gemini 2.5 Flash when…

✓ Cheaper for RAG & document retrieval (lower input cost)
✓ 40% cheaper per input token
✓ Larger context window (1M vs 16k) — better for long documents
✓ Supports prompt caching — save up to 90% on repeated prompts
✓ Optimized for: Speed & efficiency

Related Comparisons

GPT-3.5 Turbo vs GPT-5 GPT-3.5 Turbo vs GPT-5 Mini GPT-3.5 Turbo vs GPT-4.1 GPT-3.5 Turbo vs GPT-4.1 Mini Gemini 2.5 Flash vs GPT-5 Gemini 2.5 Flash vs GPT-5 Mini