Model Comparison

Gemini 3.5 Flash-Lite vs o4-miniWhich is better in 2026?

Gemini 3.5 Flash-Lite significantly outperforms across most benchmarks. Gemini 3.5 Flash-Lite is 2.3x cheaper per token.

Verdict: Gemini 3.5 Flash-Lite vs o4-mini — which is better?

Gemini 3.5 Flash-Lite (by Google) and o4-mini (by OpenAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Gemini 3.5 Flash-Lite outperforms in 1 benchmarks (CharXiv-R), while o4-mini is better at 0 benchmarks. Gemini 3.5 Flash-Lite significantly outperforms across most benchmarks.

On price, Gemini 3.5 Flash-Lite is roughly 2.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 3.5 Flash-Lite also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Gemini 3.5 Flash-Lite if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • cost matters — it's about 2.3x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Jul 2026

Choose o4-mini if…

  • you want predictable pricing at $1.10/M input and $4.40/M output

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemini 3.5 Flash-Lite outperforms in 1 benchmarks (CharXiv-R), while o4-mini is better at 0 benchmarks.

Gemini 3.5 Flash-Lite significantly outperforms across most benchmarks.

Sat Jul 25 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 3.5 Flash-Lite costs less

For input processing, Gemini 3.5 Flash-Lite ($0.30/1M tokens) is 3.7x cheaper than o4-mini ($1.10/1M tokens).

For output processing, Gemini 3.5 Flash-Lite ($2.50/1M tokens) is 1.8x cheaper than o4-mini ($4.40/1M tokens).

In conclusion, o4-mini is more expensive than Gemini 3.5 Flash-Lite.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Sat Jul 25 2026 • llm-stats.com
Google
Gemini 3.5 Flash-Lite
Input tokens$0.30
Output tokens$2.50
Best providerGoogle
OpenAI
o4-mini
Input tokens$1.10
Output tokens$4.40
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 3.5 Flash-Lite accepts 1,048,576 input tokens compared to o4-mini's 200,000 tokens. o4-mini can generate longer responses up to 100,000 tokens, while Gemini 3.5 Flash-Lite is limited to 65,536 tokens.

Google
Gemini 3.5 Flash-Lite
Input1,048,576 tokens
Output65,536 tokens
OpenAI
o4-mini
Input200,000 tokens
Output100,000 tokens
Sat Jul 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3.5 Flash-Lite and o4-mini support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Gemini 3.5 Flash-Lite

Text
Images
Audio
Video

o4-mini

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Gemini 3.5 Flash-Lite

Proprietary

Closed source

o4-mini

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.5 Flash-Lite was released on 2026-07-21, while o4-mini was released on 2025-04-16.

Gemini 3.5 Flash-Lite is 15 months newer than o4-mini.

Gemini 3.5 Flash-Lite

Jul 21, 2026

4 days ago

1.3yr newer
o4-mini

Apr 16, 2025

1.3 years ago

Knowledge Cutoff

When training data ends

Gemini 3.5 Flash-Lite has a knowledge cutoff of 2026-03-31, while o4-mini has a cutoff of 2024-05-31.

Gemini 3.5 Flash-Lite has more recent training data (up to 2026-03-31), making it potentially better informed about events through that date compared to o4-mini (2024-05-31).

Gemini 3.5 Flash-Lite

Mar 2026

1.8 yr newer
o4-mini

May 2024

Provider Availability

Gemini 3.5 Flash-Lite is available from Google. o4-mini is available from OpenAI.

Gemini 3.5 Flash-Lite

google logo
Google
Input Price:Input: $0.30/1MOutput Price:Output: $2.50/1M

o4-mini

openai logo
OpenAI
Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
Higher CharXiv-R score (76.5% vs 72.0%)
OpenAI

No standout differentiators in the data we have for this pair.

GoogleGemini 3.5 Flash-Lite
OpenAIo4-mini
Compare in Playground

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini 3.5 Flash-Lite and o4-mini side-by-side, then vote on the output you prefer.

Gemini 3.5 Flash-Lite
✓ Preferred
o4-mini
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 3.5 Flash-Lite
OpenAI
o4-mini

FAQ

Common questions about Gemini 3.5 Flash-Lite vs o4-mini.

Which is better, Gemini 3.5 Flash-Lite or o4-mini?

Gemini 3.5 Flash-Lite significantly outperforms across most benchmarks. Gemini 3.5 Flash-Lite is made by Google and o4-mini is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 3.5 Flash-Lite compare to o4-mini in benchmarks?

Gemini 3.5 Flash-Lite scores CharXiv-R: 76.5%, OSWorld-Verified: 74.0%, SWE-Bench Pro: 54.2%, Terminal-Bench 2.1: 54.0%, MLE-Bench: 39.2%. o4-mini scores AIME 2024: 93.4%, AIME 2025: 92.7%, MathVista: 84.3%, MMMU: 81.6%, GPQA: 81.4%.

Is Gemini 3.5 Flash-Lite cheaper than o4-mini?

Gemini 3.5 Flash-Lite is 3.7x cheaper for input tokens. Gemini 3.5 Flash-Lite costs $0.30/M input and $2.50/M output via google. o4-mini costs $1.10/M input and $4.40/M output via openai.

What are the context window sizes for Gemini 3.5 Flash-Lite and o4-mini?

Gemini 3.5 Flash-Lite supports 1.0M tokens and o4-mini supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3.5 Flash-Lite and o4-mini?

Key differences include context window (1.0M vs 200K), input pricing ($0.30 vs $1.10/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.5 Flash-Lite and o4-mini?

Gemini 3.5 Flash-Lite is developed by Google and o4-mini is developed by OpenAI.

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