GPT‑5.4: giant context & Tool Search
Sources report GPT‑5.4 launched with a 1.05 million‑token context window and a new “Tool Search” feature for dynamic tool calling — a big jump in context capacity for long, tool‑driven workflows. OpenAI also quietly shuttered its public Sora video API, citing cost issues as it repositions product priorities. (x.com)
OpenAI published GPT‑5.4 on March 5, 2026 and rolled it out in ChatGPT (marketed as “GPT‑5.4 Thinking”), the public API, and Codex, while also announcing a GPT‑5.4 Pro tier for higher performance. (openai.com) OpenAI’s messaging on context size is inconsistent across its pages: the public blog and product post describe a “1M‑token” context window, while the API model page and docs list models with a 1.05 million‑token context for GPT‑5.4 and GPT‑5.4 Pro. (openai.com)(developers.openai.com) The release also introduced a Tool Search mechanism that lets the model defer large tool surfaces, group functions into namespaces, and load only relevant tools at runtime to reduce prompt size. (developers.openai.com) OpenAI and community tests report that Tool Search can materially cut total prompt token usage — OpenAI’s MCP/Atlas testing and community breakdowns cite reductions of roughly 47% in token consumption for tool‑heavy agent workflows. (community.openai.com)(mindstudio.ai) The API documentation and community pricing breakdowns show higher per‑token rates for the extra‑large context tiers (for prompts >272K tokens) and list gpt‑5.4 input at $2.50 per 1,000 tokens and output at $15 per 1,000 tokens, with gpt‑5.4‑pro set at $30/$180 per 1,000 in published tables. (developers.openai.com)(community.openai.com) On March 24, 2026 OpenAI announced it will discontinue the Sora app and the public Sora API, posting “We’re saying goodbye to Sora” and promising timelines for preserving users’ work as it winds down the service. (nbcnews.com)(tech.yahoo.com) Reporting and company comments tie Sora’s closure to high compute costs and a broader product refocus ahead of an expected IPO, while saying OpenAI will keep the underlying Sora research team and technology even as it ends the consumer app and public API and winds down the Disney partnership. (cnbc.com)(extremetech.com)(bloomberg.com) Taken together, OpenAI’s launch of an agent‑focused, huge‑context model and its quiet shutdown of a compute‑intensive consumer video API underline a product shift toward tool‑driven, enterprise agent workflows and away from viral consumer video experiments, according to the company’s product notes and contemporaneous reporting. (openai.com)(bloomberg.com)
