Gemini 1.5 Flash >128k vs GPT-5.1 Codex mini
Side-by-side comparison of pricing and capabilities
Gemini 1.5 Flash >128k
GPT-5.1 Codex mini
Input Price Comparison
| Attribute | Gemini 1.5 Flash >128k | GPT-5.1 Codex mini |
|---|---|---|
| Provider | OpenAI | |
| Input Price | $0.15 /1M tokens | $0.25 /1M tokens |
| Output Price | $0.6 /1M tokens | $2 /1M tokens |
| Cached Input | $0.015 /1M tokens | $0.025 /1M tokens |
| Context Window | 1.0M | 400K |
| Type | chat | chat |
| Status | deprecated | current |
Capability Comparison
| Capability | Gemini 1.5 Flash >128k | GPT-5.1 Codex mini |
|---|---|---|
| vision | ||
| multilingual | ||
| coding |
Which should you choose?
Budget-conscious: Gemini 1.5 Flash >128k is 40% cheaper on input tokens ($0.15 vs $0.25 per 1M tokens).
Context-heavy tasks: Gemini 1.5 Flash >128k offers a larger context window (1.0M vs 400K), making it better for long documents or conversations.
Capability fit: Gemini 1.5 Flash >128k supports 2 capabilities (vision, multilingual), while GPT-5.1 Codex mini supports 1 (coding).
Frequently Asked Questions
Which is cheaper: Gemini 1.5 Flash >128k or GPT-5.1 Codex mini?
Gemini 1.5 Flash >128k costs $0.15/1M input vs GPT-5.1 Codex mini at $0.25/1M input. Gemini 1.5 Flash >128k is 40% cheaper on input tokens.
How do output prices compare between Gemini 1.5 Flash >128k and GPT-5.1 Codex mini?
Gemini 1.5 Flash >128k output: $0.6/1M, GPT-5.1 Codex mini output: $2/1M. Gemini 1.5 Flash >128k is more economical for generation-heavy workloads.
What is Gemini 1.5 Flash >128k best used for?
Gemini 1.5 Flash >128k is best for budget-conscious applications, high-volume chatbots, and tasks where cost efficiency is the primary concern.
What is GPT-5.1 Codex mini best used for?
GPT-5.1 Codex mini is suited for complex reasoning, analysis, and tasks that benefit from its coding capabilities.