Altman announced GPT-5.3 Codex 18 minutes after Anthropic released Opus 4.6
Morgan Linton · Claude Opus 4.6 vs GPT-5.3 Codex · Feb 6, 2026 · at 1:43
Morgan Linton, co-founder of Bold Metrics, talks to Greg Isenberg about the rapid succession of major AI model releases from Anthropic and OpenAI.
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“Opus four, six came out and then Sam Altman put together a quick tweet. I want to say like maybe 18 minutes later announcing GPT five, three codex”
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Claude excels at system comprehension while GPT-5.3 rules rapid pair programming
“So, high level, what that means is Claude is better when the task is understand everything first and then decide. GPT Thrive Five Three Codex is probably better when the task is decide fast, act, iterate, more of that, you know, pair programming, you know, mid…”
Linton: GPT-5.3 Codex beat Opus 4.6 on SWE-bench Pro and TerminalBench
“Five, five, three codecs did win on SWD bench pro terminal bench overall. It's like scored better on coding benchmarks. So probably better end end app generation.”
Autonomous AI agents will massively multiply token consumption and revenue for Anthropic
“I think that's one of the very good things for like, Investors in Anthropic, right, is with agents and agents now being, I think probably the new killer feature in Opus. You're going to take whatever token usage and multiply it by the number of agents.”
Claude Opus 4.6 beat GPT-5.3 Codex in a head-to-head coding test
“I mean, I would say, you know, like I said, I'm not going to say which one is, it's not that Opus is better than Codex or vice versa, but I would say in this test, Opus won.”
Morgan Linton predicts engineering teams will use both Codex and Opus 4.6
“Where I think you're going to see a lot of teams using both, because Codex really is your collaborator, and what they've added with Five-Three is, like, really good, like, mid-execution steering, whereas with Opus Four-Six, it's probably the best of the best n…”