Gemini 3 Flash vs GPT-5.3 Chat Comparison

Comparing Gemini 3 Flash and GPT-5.3 Chat across benchmarks, pricing, and capabilities.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Gemini 3 Flash and GPT-5.3 Chat don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 3 Flash costs less

For input processing, Gemini 3 Flash ($0.50/1M tokens) is 3.5x cheaper than GPT-5.3 Chat ($1.75/1M tokens).

For output processing, Gemini 3 Flash ($3.00/1M tokens) is 4.7x cheaper than GPT-5.3 Chat ($14.00/1M tokens).

In conclusion, GPT-5.3 Chat is more expensive than Gemini 3 Flash.*

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

Lowest available price from all providers

Sat Mar 14 2026 • llm-stats.com

Gemini 3 Flash

Input tokens$0.50

Output tokens$3.00

Best providerGoogle

GPT-5.3 Chat

Input tokens$1.75

Output tokens$14.00

Best providerOpenAI

Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 3 Flash accepts 1,000,000 input tokens compared to GPT-5.3 Chat's 128,000 tokens. Gemini 3 Flash can generate longer responses up to 65,536 tokens, while GPT-5.3 Chat is limited to 16,384 tokens.

Gemini 3 Flash

Input1,000,000 tokens

Output65,536 tokens

GPT-5.3 Chat

Input128,000 tokens

Output16,384 tokens

Sat Mar 14 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3 Flash and GPT-5.3 Chat support multimodal inputs.

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

Gemini 3 Flash

Text

Images

Audio

Video

GPT-5.3 Chat

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 Flash

Proprietary

Closed source

GPT-5.3 Chat

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3 Flash was released on 2025-12-17, while GPT-5.3 Chat was released on 2026-03-04.

GPT-5.3 Chat is 3 months newer than Gemini 3 Flash.

Gemini 3 Flash

Dec 17, 2025

2 months ago

GPT-5.3 Chat

Mar 4, 2026

1 weeks ago

2mo newer

Knowledge Cutoff

When training data ends

Gemini 3 Flash has a knowledge cutoff of 2025-01-31, while GPT-5.3 Chat has a cutoff of 2025-08-31.

GPT-5.3 Chat has more recent training data (up to 2025-08-31), making it potentially better informed about events through that date compared to Gemini 3 Flash (2025-01-31).

Gemini 3 Flash

Jan 2025

GPT-5.3 Chat

Aug 2025

7 mo newer

Provider Availability

Gemini 3 Flash is available from Google. GPT-5.3 Chat is available from OpenAI. The availability of providers can affect quality of the model and reliability.