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GPT-5.1 Codex Max vs GPT-5.1 Instant
Comprehensive side-by-side LLM comparison
GPT-5.1 Instant supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
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OpenAI
GPT-5.1 Codex Max, released by OpenAI in November 2025, is an enhanced coding variant from the GPT-5.1 Codex line, designed for more complex software engineering tasks requiring additional reasoning depth. It targets large-scale code generation, automated refactoring, and sophisticated agentic development workflows.
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OpenAI
GPT-5.1 Instant, released by OpenAI in November 2025, is a low-latency variant from the GPT-5.1 family optimized for fast response times and high-throughput workloads. It targets real-time applications, conversational assistants, and production APIs where response speed is a primary requirement alongside GPT-5.1-generation reasoning quality.
Launched on the same date
GPT-5.1 Codex Max
OpenAI
2025-11
GPT-5.1 Instant
OpenAI
2025-11
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5.1 Codex Max
0 providers
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GPT-5.1 Instant
0 providers
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GPT-5.1 Codex Max
Avg Score:0.0%
Providers:0
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GPT-5.1 Instant
Avg Score:0.0%
Providers:0