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Gemini 3.8 Flash vs GPT 3.5 Turbo 16K

At a glance

Google's most intelligent Flash model, with significant gains over 3.7 Flash across software engineering, agentic tasks, and multi-step reasoning.

1.0M ctx$0.75/$3.75 per M

GPT 3.5 Turbo with extended 16K context window.

16K ctx$3.00/$4.00 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper54%
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Specs
1.0M
Context
66K
Max output
Sep 2026
Released
16K
Context
4K
Max output
Aug 2023
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input75%$0.75/M tokens
Output6%$3.75/M tokens
Reasoning$3.75/M tokens
Cache read$0.07/M tokens
Cache write$0.04/M tokens
Image input$0.75/M tokens
Audio input$0.75/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input$3.00/M tokens
Output$4.00/M tokens
Chat with Gemini 3.8 FlashGo to model
Chat with GPT 3.5 Turbo 16KGo to model
Frequently Asked Questions: Gemini 3.8 Flash vs GPT 3.5 Turbo 16K▼

Which is better, Gemini 3.8 Flash or GPT 3.5 Turbo 16K?

▼

Both Gemini 3.8 Flash and GPT 3.5 Turbo 16K are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Gemini 3.8 Flash or GPT 3.5 Turbo 16K?

▼

Gemini 3.8 Flash has a lower blended cost. Gemini 3.8 Flash: $0.75 input / $3.75 output. GPT 3.5 Turbo 16K: $3.00 input / $4.00 output.

Which has a larger context window, Gemini 3.8 Flash or GPT 3.5 Turbo 16K?

▼

Gemini 3.8 Flash has a larger context window: Gemini 3.8 Flash supports 1M tokens vs GPT 3.5 Turbo 16K at 16K tokens.

Do both Gemini 3.8 Flash and GPT 3.5 Turbo 16K support vision?

▼

Gemini 3.8 Flash supports vision/image input, but GPT 3.5 Turbo 16K does not.

What are the key differences between Gemini 3.8 Flash and GPT 3.5 Turbo 16K?

▼

Key differences: Gemini 3.8 Flash is significantly cheaper; only Gemini 3.8 Flash supports vision input; only Gemini 3.8 Flash offers extended reasoning mode. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Gemini 3.8 Flash and GPT 3.5 Turbo 16K for free on idapt.app to see which performs better for your specific needs.

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