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Gemini 3.1 Flash Lite vs GPT 3.5 Turbo Instruct

At a glance
GoogleGemini 3.1 Flash Lite

Google's high-efficiency model for high-volume use cases at half the cost of Gemini 3 Flash.

771.0M ctx$0.25/$1.50 per M#37/92
OpenAIGPT 3.5 Turbo Instruct

Instruction-following variant of GPT-3.5 for completion-style tasks.

4K ctx$1.50/$2.00 per M
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
GoogleGemini 3.1 Flash Lite
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Capability
CapabilityECI76.7
Reasoning & Knowledge
Expert-Level8.6%
Agentic
Task Horizon—
OpenAIGPT 3.5 Turbo Instruct
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-07-10
Capability
Capability—
Reasoning & Knowledge
Expert-Level—
Agentic
Task Horizon1min
Specs
GoogleGemini 3.1 Flash Lite
1.0M
Context
66K
Max output
Mar 2026
Released
OpenAIGPT 3.5 Turbo Instruct
4K
Context
4K
Max output
Sep 2023
Released
Capabilities
GoogleGemini 3.1 Flash Lite
Vision
Audio
Reasoning
OpenAIGPT 3.5 Turbo Instruct
Vision
Audio
Reasoning
Pricing
GoogleGemini 3.1 Flash Lite
Live pricing, shown before you run
Input$0.25/M tokens
Output$1.50/M tokens
Reasoning$1.50/M tokens
Cache read$0.02/M tokens
Cache write$0.08/M tokens
Image input$0.25/M tokens
Audio input$0.50/M tokens
Web search$0.01/search
OpenAIGPT 3.5 Turbo Instruct
Live pricing, shown before you run
Input$1.50/M tokens
Output$2.00/M tokens
Chat with Gemini 3.1 Flash LiteGo to model
Chat with GPT 3.5 Turbo InstructGo to model
Frequently Asked Questions: Gemini 3.1 Flash Lite vs GPT 3.5 Turbo Instruct▼

Which is better, Gemini 3.1 Flash Lite or GPT 3.5 Turbo Instruct?

▼

Both Gemini 3.1 Flash Lite and GPT 3.5 Turbo Instruct 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 3.1 Flash Lite or GPT 3.5 Turbo Instruct?

▼

Gemini 3.1 Flash Lite has a lower blended cost. Gemini 3.1 Flash Lite: $0.25 input / $1.50 output. GPT 3.5 Turbo Instruct: $1.50 input / $2.00 output.

Which has a larger context window, Gemini 3.1 Flash Lite or GPT 3.5 Turbo Instruct?

▼

Gemini 3.1 Flash Lite has a larger context window: Gemini 3.1 Flash Lite supports 1M tokens vs GPT 3.5 Turbo Instruct at 4K tokens.

Do both Gemini 3.1 Flash Lite and GPT 3.5 Turbo Instruct support vision?

▼

Gemini 3.1 Flash Lite supports vision/image input, but GPT 3.5 Turbo Instruct does not.

What are the key differences between Gemini 3.1 Flash Lite and GPT 3.5 Turbo Instruct?

▼

Key differences: Gemini 3.1 Flash Lite is significantly cheaper; only Gemini 3.1 Flash Lite supports vision input; only Gemini 3.1 Flash Lite 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 3.1 Flash Lite and GPT 3.5 Turbo Instruct for free on idapt.app to see which performs better for your specific needs.

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