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Open-source — AI news & analysis
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OpenAI didn't open-source Codex this week — it did something more consequential
On 19-20 August 2026 OpenAI published 'Codex as a platform' and documented the Codex app-server as a stable integration target. The code was already Apache-2.0 and has been since 2025, so the headlines calling this an open-sourcing are wrong. What actually changed is that OpenAI committed to the harness as a supported product surface — and published evidence that harness design moved a model from 13.3% to 38.3% on ARC-AGI-3 while cutting output tokens sixfold.
Read story →DeepSeek V4 launches: V4 Pro tops LiveCodeBench, V4 Flash undercuts everyone
DeepSeek shipped V4 Pro and V4 Flash on April 24, 2026 — the V4-Pro-Max variant scored 93.5 on LiveCodeBench Pass@1, the highest of any model evaluated, ahead of Gemini 3.1 Pro and Claude Opus 4.6 Max. V4 Flash at $0.14/$0.28 per million tokens undercuts every Western 'cheap' model. The Sputnik moment isn't a one-off.
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