Gemini 3 Pro alternatives
Looking for an alternative to Gemini 3 Pro? Here are the 6 closest llm provider / model options for AI coding, each ranked by how well it replaces Gemini 3 Pro — with the concrete reason to switch.
Quick comparison
| Model | Input price | SWE-bench | Context window | Speed |
|---|---|---|---|---|
| Gemini 3 Pro (you) | $2 | 76% | 1M+ | Medium |
| GPT-5.5 | $5 | 75% | 1M+ | Standard |
| GPT-5.1 Codex | $1.25 | 75% | 400K | Medium |
| GPT-5.1 | $1.25 | 76% | 400K | Medium |
| Gemini 2.5 Pro | $1.25 | 63% | 1M+ | Standard |
| o4-mini | $1.10 | 68% | 200K | Fast |
| GPT-5.4 | $3 | 74% | 1M+ | Standard |
The best Gemini 3 Pro alternatives
GPT-5.5
Frontier reasoning, agentic coding, long-context refactors, multimodal analysis, replaces GPT-5.4 as default flagship
Why consider it instead:
- Built for: Frontier reasoning, agentic coding, long-context refactors, multimodal analysis, replaces GPT-5.4 as default flagship
Codex CLI and long-horizon coding agents; engineered for terminal-driven workflows
Why consider it instead:
- Cheaper — $1.25/1M input vs $2, ~1.6× less
GPT-5.1
Default daily-driver coding agent with adaptive reasoning and warmer chat tone
Why consider it instead:
- Cheaper — $1.25/1M input vs $2, ~1.6× less
Advanced reasoning, multimodal workflows, massive context tasks, agentic coding
Why consider it instead:
- Cheaper — $1.25/1M input vs $2, ~1.6× less
o4-mini
Cheap fast reasoning, agentic coding loops, high-volume tasks
Why consider it instead:
- Cheaper — $1.1/1M input vs $2, ~1.8× less
- Faster — better for autocomplete
GPT-5.4
Production agentic coding, multi-step tool use, balanced cost/quality on long-context tasks, GPT-5.5 alternative at lower cost
Why consider it instead:
- Built for: Production agentic coding, multi-step tool use, balanced cost/quality on long-context tasks, GPT-5.5 alternative at lower cost
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