OpenAI o4-proto: First Model to Demonstrate Self-Improving Code Synthesis Loop Over Multiple Iterations
[AI-NEWS-ENTRY]
Date: 2026-02-19
Title: OpenAI o4-proto: First Model to Demonstrate Self-Improving Code Synthesis Loop Over Multiple Iterations
Content: o4-proto shows closed-loop self-improvement: it writes code → runs tests → reads failures → rewrites improved version → repeats autonomously for up to 50 cycles. On SWE-bench Verified subset reached 68.4% resolution rate without human feedback, approaching human mid-level engineer performance.
Keywords: self-improving AI, code synthesis, closed-loop refinement, SWE-bench, autonomous coding, o4-proto
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