Gemini 2.5 Pro is Google’s state-of-the-art AI model designed for advanced reasoning, coding, mathematics, and scientific tasks. It employs “thinking” capabilities, enabling it to reason through responses with enhanced accuracy and nuanced …
Model details →Google: Gemini 2.5 Pro Preview 05-06 vs OpenAI: GPT-5.3-Codex
Google: Gemini 2.5 Pro Preview 05-06 wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-a…
Model details →Side-by-side comparison
| Capability | Google: Gemini 2.5 Pro Preview 05-06 | OpenAI: GPT-5.3-Codex | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.0M | 400K | 🏆 Google: Gemini 2.5 Pro Preview 05-06 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.25 | $1.75 | 🏆 Google: Gemini 2.5 Pro Preview 05-06 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $10.00 | $14.00 | 🏆 Google: Gemini 2.5 Pro Preview 05-06 |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Google: Gemini 2.5 Pro Preview 05-06 better than OpenAI: GPT-5.3-Codex?
Google: Gemini 2.5 Pro Preview 05-06 wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Google: Gemini 2.5 Pro Preview 05-06 and OpenAI: GPT-5.3-Codex?
Input: $1.25 vs $1.75 per 1M tokens. Output: $10.00 vs $14.00 per 1M tokens.
What context windows do Google: Gemini 2.5 Pro Preview 05-06 and OpenAI: GPT-5.3-Codex support?
Google: Gemini 2.5 Pro Preview 05-06 supports up to 1.0M tokens. OpenAI: GPT-5.3-Codex supports up to 400K tokens.
Do both Google: Gemini 2.5 Pro Preview 05-06 and OpenAI: GPT-5.3-Codex support tool calling?
Google: Gemini 2.5 Pro Preview 05-06: yes. OpenAI: GPT-5.3-Codex: yes.