OPEN LINK ↗
// 82d agoMODEL RELEASE
GPT-5.4 arrives with Thinking, Pro
OpenAI has rolled out GPT-5.4 as its new flagship model, with GPT-5.4 Thinking for deeper reasoning and GPT-5.4 Pro as a higher-compute tier for tougher professional workloads. The launch also brings a 1.05M-token context window, 128K max output, image input support, and broad availability across ChatGPT, the API, and Codex.
// ANALYSIS
OpenAI is turning its flagship model line into a clearer ladder of speed, cost, and reasoning depth rather than betting on one default model for everyone.
- –Base GPT-5.4 is positioned as the general professional-work model, with state-of-the-art coding and reasoning claims plus far cheaper pricing than Pro
- –GPT-5.4 Pro is clearly aimed at agentic and high-stakes workflows: it is slower, can take minutes on hard tasks, and is exposed in the Responses API for longer-running interactions
- –The 1.05M-token context window matters more than the branding bump because it makes large-repo analysis, long documents, and multi-step tool use much more practical
- –Splitting Thinking and Pro tiers gives developers a more explicit latency-versus-quality choice, but it also makes OpenAI’s pricing ladder much steeper for teams that want the best answers consistently
// TAGS
gpt-5.4llmreasoningapimultimodal
DISCOVERED
82d ago
2026-03-06
PUBLISHED
83d ago
2026-03-05
RELEVANCE
10/ 10
AUTHOR
twtw99