Linton: GPT-5.3 Codex has a context window of roughly 200k tokens
Morgan Linton · Claude Opus 4.6 vs GPT-5.3 Codex · Feb 6, 2026 · at 11:55
Morgan Linton evaluates OpenAI's GPT-5.3 Codex context window compared to Claude Opus 4.6.
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“Five, three, they talk about large context, but it's not a headline feature, and I actually went back and forth with it to get it to actually give me a number, and the number's around 200,000 tokens, which is not that impressive.”
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