Gemini 3.8 Flash vs GPT-5 nano
Gemini 3.8 Flash leads the LLM Stats Score 50.5 to 19.5. GPT-5 nano is 10.9x cheaper per token.
Google · OpenAI · Updated for 2026
Which is better?
Gemini 3.8 Flash leads the overall LLM Stats Score 50.5 to 19.5, ranking #17 overall.
On price, GPT-5 nano is roughly 10.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Gemini 3.8 Flash 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 LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Gemini 3.8 Flash
- overall performance matters — it scores 50.5 and ranks #17 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Sep 2026
Choose GPT-5 nano
- cost matters — it's about 10.9x cheaper per token
At a glance
The differences that matter most.
Individual benchmarks
13 reported for Gemini 3.8 Flash · 5 for GPT-5 nano
Gemini 3.8 Flash and GPT-5 nanodon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 3.8 Flash ($0.75/1M tokens) is 15.0x more expensive than GPT-5 nano ($0.05/1M tokens).
For output processing, Gemini 3.8 Flash ($3.75/1M tokens) is 9.4x more expensive than GPT-5 nano ($0.40/1M tokens).
In conclusion, Gemini 3.8 Flash is more expensive than GPT-5 nano.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Gemini 3.8 Flash accepts 1,048,576 input tokens compared to GPT-5 nano's 400,000 tokens. GPT-5 nano can generate longer responses up to 128,000 tokens, while Gemini 3.8 Flash is limited to 65,536 tokens.
Input capabilities
Documented input modalities across available providers
Both Gemini 3.8 Flash and GPT-5 nano support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Gemini 3.8 Flash
GPT-5 nano
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Gemini 3.8 Flash was released on 2026-09-02, while GPT-5 nano was released on 2025-08-07.
Gemini 3.8 Flash is 13 months newer than GPT-5 nano.
Sep 2, 2026
2 weeks ago
1.1yr newerAug 7, 2025
1.1 years ago
Knowledge Cutoff
When training data ends
Gemini 3.8 Flash has a knowledge cutoff of 2026-03-31, while GPT-5 nano has a cutoff of 2024-05-30.
Gemini 3.8 Flash has more recent training data (up to 2026-03-31), making it potentially better informed about events through that date compared to GPT-5 nano (2024-05-30).
Mar 2026
1.8 yr newerMay 2024
Provider Availability
Gemini 3.8 Flash is available from Google. GPT-5 nano is available from OpenAI.
Gemini 3.8 Flash
GPT-5 nano
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 3.8 Flash and GPT-5 nano side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 3.8 Flash vs GPT-5 nano.