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#GPT-5.4

Browse SynapseWire coverage, updates, and related reads about GPT-5.4.

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Editorial-style cover for GPT-5.4-Cyber as OpenAI's response to Anthropic Mythos

#01 2026.04.16

OpenAI Ships GPT-5.4-Cyber: A Direct Response to Mythos, on a Very Different Track

On April 14, 2026 — one week after Anthropic's Project Glasswing — OpenAI released GPT-5.4-Cyber, a fine-tuned model for vetted security professionals, with binary reverse engineering included. Both labs are responding to the same problem and have landed on opposite commercial decisions. That's the story this week.

OpenAI GPT-5.4 model launch showcasing computer use capabilities interface

AI News

#02 2026.03.05

OpenAI GPT-5.4: Native Computer Use, 1M Context, Benchmarks and API Pricing

OpenAI's GPT-5.4, released March 5, 2026: native computer use, 1M-token context, tool search, published benchmarks versus GPT-5.2, ChatGPT availability and API pricing, with practical notes and limitations.