Model Comparison

Gemini 3.5 Flash-Lite vs GPT-5.5Which is better in 2026?

GPT-5.5 shows notably better performance in the majority of benchmarks. Gemini 3.5 Flash-Lite is 13.2x cheaper per token.

Verdict: Gemini 3.5 Flash-Lite vs GPT-5.5 — which is better?

Gemini 3.5 Flash-Lite (by Google) and GPT-5.5 (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 (GDPval-AA), while GPT-5.5 is better at 3 benchmarks (MRCR v2 (8-needle), OSWorld-Verified, SWE-Bench Pro). GPT-5.5 shows notably better performance in the majority of benchmarks.

On price, Gemini 3.5 Flash-Lite is roughly 13.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-5.5 also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Gemini 3.5 Flash-Lite if…

  • cost matters — it's about 13.2x cheaper per token
  • you want the most recent training data — it shipped Jul 2026

Choose GPT-5.5 if…

  • you want the strongest raw capability — it leads on 3 of 4 shared benchmarks
  • you process long inputs — it offers a 1,050,000 token context window

Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Gemini 3.5 Flash-Lite outperforms in 1 benchmarks (GDPval-AA), while GPT-5.5 is better at 3 benchmarks (MRCR v2 (8-needle), OSWorld-Verified, SWE-Bench Pro).

GPT-5.5 shows notably better performance in the majority of benchmarks.

Wed Jul 22 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 16.7x cheaper than GPT-5.5 ($5.00/1M tokens).

For output processing, Gemini 3.5 Flash-Lite ($2.50/1M tokens) is 12.0x cheaper than GPT-5.5 ($30.00/1M tokens).

In conclusion, GPT-5.5 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
Wed Jul 22 2026 • llm-stats.com
Google
Gemini 3.5 Flash-Lite
Input tokens$0.30
Output tokens$2.50
Best providerGoogle
OpenAI
GPT-5.5
Input tokens$5.00
Output tokens$30.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5.5 accepts 1,050,000 input tokens compared to Gemini 3.5 Flash-Lite's 1,048,576 tokens. GPT-5.5 can generate longer responses up to 128,000 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
GPT-5.5
Input1,050,000 tokens
Output128,000 tokens
Wed Jul 22 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3.5 Flash-Lite and GPT-5.5 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

GPT-5.5

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

GPT-5.5

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.5 Flash-Lite was released on 2026-07-21, while GPT-5.5 was released on 2026-04-23.

Gemini 3.5 Flash-Lite is 3 months newer than GPT-5.5.

Gemini 3.5 Flash-Lite

Jul 21, 2026

0 days ago

2mo newer
GPT-5.5

Apr 23, 2026

2 months ago

Knowledge Cutoff

When training data ends

Gemini 3.5 Flash-Lite has a knowledge cutoff of 2026-03-31, while GPT-5.5 has a cutoff of 2025-12-01.

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 GPT-5.5 (2025-12-01).

Gemini 3.5 Flash-Lite

Mar 2026

3 mo newer
GPT-5.5

Dec 2025

Provider Availability

Gemini 3.5 Flash-Lite is available from Google. GPT-5.5 is available from OpenAI.

Gemini 3.5 Flash-Lite

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

GPT-5.5

openai logo
OpenAI
Input Price:Input: $5.00/1MOutput Price:Output: $30.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Google
Less expensive input tokens
Less expensive output tokens
Higher GDPval-AA score (38.0% vs 37.8%)
OpenAI
Larger context window (1,050,000 tokens)
Higher MRCR v2 (8-needle) score (74.0% vs 21.3%)
Higher OSWorld-Verified score (78.7% vs 74.0%)
Higher SWE-Bench Pro score (58.6% vs 54.2%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini 3.5 Flash-Lite and GPT-5.5 side-by-side, then vote on the output you prefer.

Gemini 3.5 Flash-Lite
✓ Preferred
GPT-5.5
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 3.5 Flash-Lite
OpenAI
GPT-5.5

FAQ

Common questions about Gemini 3.5 Flash-Lite vs GPT-5.5.

Which is better, Gemini 3.5 Flash-Lite or GPT-5.5?

GPT-5.5 shows notably better performance in the majority of benchmarks. Gemini 3.5 Flash-Lite is made by Google and GPT-5.5 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 GPT-5.5 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%. GPT-5.5 scores Tau2 Telecom: 98.0%, ARC-AGI: 95.0%, GPQA: 93.6%, ARC-AGI v2: 85.0%, GDPval-MM: 84.9%.

Is Gemini 3.5 Flash-Lite cheaper than GPT-5.5?

Gemini 3.5 Flash-Lite is 16.7x cheaper for input tokens. Gemini 3.5 Flash-Lite costs $0.30/M input and $2.50/M output via google. GPT-5.5 costs $5.00/M input and $30.00/M output via openai.

What are the context window sizes for Gemini 3.5 Flash-Lite and GPT-5.5?

Gemini 3.5 Flash-Lite supports 1.0M tokens and GPT-5.5 supports 1.1M 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 GPT-5.5?

Key differences include context window (1.0M vs 1.1M), input pricing ($0.30 vs $5.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.5 Flash-Lite and GPT-5.5?

Gemini 3.5 Flash-Lite is developed by Google and GPT-5.5 is developed by OpenAI.

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