GPT-5.5 alternatives
Looking for an alternative to GPT-5.5? Here are the 6 closest llm provider / model options for AI coding, each ranked by how well it replaces GPT-5.5 — with the concrete reason to switch.
Quick comparison
| Model | Input price | SWE-bench | Context window | Speed |
|---|---|---|---|---|
| GPT-5.5 (you) | $5 | 75% | 1M+ | Standard |
| Claude Opus 4.7 | $15 | 72% | 200K | Slow/Reasoning |
| GPT-5.4 | $3 | 74% | 1M+ | Standard |
| Llama 4 Behemoth | $3 | 74% | 1M+ | Slow/Reasoning |
| GPT-5.1 | $1.25 | 76% | 400K | Medium |
| Grok 5 | $5 | 72% | 1M+ | Medium |
| MiMo V2.5 Pro | Free (self-hosted) | 79% | 1M+ | Standard |
The best GPT-5.5 alternatives
Complex refactors, agentic coding, hard debugging, deep reasoning
Why consider it instead:
- Built for: Complex refactors, agentic coding, hard debugging, deep reasoning
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:
- Cheaper — $3/1M input vs $5, ~1.7× less
Self-hosted frontier reasoning, complex agentic coding, multimodal analysis
Why consider it instead:
- Cheaper — $3/1M input vs $5, ~1.7× 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 $5, ~4.0× less
- Higher SWE-bench (76% vs 75%)
Grok 5
Real-time web/X context, long-context analysis, and agentic browsing
Why consider it instead:
- Built for: Real-time web/X context, long-context analysis, and agentic browsing
Highest open-weight coding performance, 1M context agentic tasks, complex multi-step engineering, long-context reasoning
Why consider it instead:
- Cheaper — $0/1M input vs $5
- Higher SWE-bench (79% vs 75%)
Switching from GPT-5.5? Check the new tool fits the rest of your stack — Flowpicker shows compatibility warnings live.
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