Model comparison
Gemini 2.5 Flash vs GPT-5.4 Mini
The most significant observable difference is Gemini 2.5 Flash's ability to handle a larger token context window of 1,048,576 tokens compared to GPT-5.4 Mini's 400,000 tokens.
Gemini 2.5 Flash
Cheap multimodal at million-token scale.
OpenAI
GPT-5.4 Mini
GPT-5 economics for high-volume routine tasks.
Specs
| Metric | Gemini 2.5 Flash | GPT-5.4 Mini |
|---|---|---|
| Context window | 1.0M tokens↑ | 400K tokens |
| Input $/1M tokens | $0.300↑ | $0.750 |
| Output $/1M tokens | $2.50↑ | $4.50 |
| Modalities | File · Image · Text · Audio · Video | File · Image · Text |
| Open weights | No | No |
Capability differences
| Capability | Gemini 2.5 Flash | GPT-5.4 Mini |
|---|---|---|
| Extended thinking | Yes | No |
How they differ
Context handling
Gemini 2.5 Flash
Gemini 2.5 Flash excels in processing larger datasets and maintaining extensive conversational histories due to its 1,048,576-token context window.
GPT-5.4 Mini
GPT-5.4 Mini supports up to 400,000 tokens, suitable for moderate-scale tasks but limited for very large inputs or conversations.
Reasoning approach
Gemini 2.5 Flash
Gemini 2.5 Flash integrates multimodal reasoning with support for text, file, image, audio, and video inputs.
GPT-5.4 Mini
GPT-5.4 Mini focuses on high-quality reasoning with text and file inputs but lacks native audio and video support.
Cost profile
Gemini 2.5 Flash
Gemini 2.5 Flash offers a cost-efficient operation at $0.3/1M input tokens and $2.5/1M output tokens.
GPT-5.4 Mini
GPT-5.4 Mini has a higher cost profile, charging $0.75/1M input tokens and $4.5/1M output tokens.
Vision
Gemini 2.5 Flash
Gemini 2.5 Flash supports vision-related tasks with image processing alongside other media types.
GPT-5.4 Mini
GPT-5.4 Mini handles image inputs but lacks comprehensive multimodal support for audio and video.
Open weights
Gemini 2.5 Flash
Gemini 2.5 Flash does not offer open weights and remains proprietary to Google.
GPT-5.4 Mini
GPT-5.4 Mini does not provide open-source weights and remains proprietary to OpenAI.
Gemini 2.5 Flash — what sets it apart
- +Gemini 2.5 Flash supports audio and video inputs in addition to text, files, and images.
- +Gemini 2.5 Flash allows a much larger token context size, enabling richer long-form processing.
- +Gemini 2.5 Flash is notably more cost-efficient for both input and output tokens.
GPT-5.4 Mini — what sets it apart
- +GPT-5.4 Mini focuses exclusively on text and file inputs without multimodal capabilities.
- +GPT-5.4 Mini's narrower focus on text supports simpler reasoning workflows.
- +GPT-5.4 Mini is configured for latency-sensitive text-heavy applications despite higher costs.
Gemini 2.5 Flash's larger token context and multimodal capabilities stand out as the most consequential differences for tasks requiring extensive input-output workflows.
Analysis synthesized from gpt-4o, llama-4-maverick, phi-4, etc.