Gemini 2.5 Flash-Lite vs Grok-4
Grok-4 significantly outperforms across most benchmarks. Gemini 2.5 Flash-Lite is 34.3x cheaper per token.
Google · xAI · Updated for 2026
Which is better?
Gemini 2.5 Flash-Lite outperforms in 0 benchmarks, while Grok-4 is better at 4 benchmarks (AIME 2025, GPQA, Humanity's Last Exam, LiveCodeBench). Grok-4 significantly outperforms across most benchmarks.
On price, Gemini 2.5 Flash-Lite is roughly 34.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Gemini 2.5 Flash-Lite also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current benchmark, pricing, and model metadata for 2026.
Choose Gemini 2.5 Flash-Lite
- cost matters — it's about 34.3x cheaper per token
- you process long inputs — it offers a 1,048,576 token context window
- you need open weights you can self-host or fine-tune
Choose Grok-4
- you want the strongest raw capability — it leads on 4 of 4 shared benchmarks
- you want the most recent training data — it shipped Jul 2025
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
Gemini 2.5 Flash-Lite outperforms in 0 benchmarks, while Grok-4 is better at 4 benchmarks (AIME 2025, GPQA, Humanity's Last Exam, LiveCodeBench).
Grok-4 significantly outperforms across most benchmarks.
Arena Performance
Playground indexes and blind preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 2.5 Flash-Lite ($0.10/1M tokens) is 30.0x cheaper than Grok-4 ($3.00/1M tokens).
For output processing, Gemini 2.5 Flash-Lite ($0.40/1M tokens) is 37.5x cheaper than Grok-4 ($15.00/1M tokens).
In conclusion, Grok-4 is more expensive than Gemini 2.5 Flash-Lite.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Gemini 2.5 Flash-Lite accepts 1,048,576 input tokens compared to Grok-4's 256,000 tokens. Gemini 2.5 Flash-Lite can generate longer responses up to 65,536 tokens, while Grok-4 is limited to 8,000 tokens.
Input Capabilities
Supported data types and modalities
Both Gemini 2.5 Flash-Lite and Grok-4 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Gemini 2.5 Flash-Lite
Grok-4
License
Usage and distribution terms
Gemini 2.5 Flash-Lite is licensed under Creative Commons Attribution 4.0 License, while Grok-4 uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
Creative Commons Attribution 4.0 License
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
Gemini 2.5 Flash-Lite was released on 2025-06-17, while Grok-4 was released on 2025-07-09.
Grok-4 is 1 month newer than Gemini 2.5 Flash-Lite.
Jun 17, 2025
1.2 years ago
Jul 9, 2025
1.1 years ago
3w newerKnowledge Cutoff
When training data ends
Gemini 2.5 Flash-Lite has a knowledge cutoff of 2025-01-01, while Grok-4 has a cutoff of 2024-12-31.
Gemini 2.5 Flash-Lite has more recent training data (up to 2025-01-01), making it potentially better informed about events through that date compared to Grok-4 (2024-12-31).
Jan 2025
1 mo newerDec 2024
Provider Availability
Gemini 2.5 Flash-Lite is available from Google. Grok-4 is available from xAI.
Gemini 2.5 Flash-Lite
Grok-4
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 2.5 Flash-Lite and Grok-4 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 2.5 Flash-Lite vs Grok-4.