Latent Space AI OpenAI Launches ChatGPT 5.4
Mar 6, 2026
A tour of ChatGPT 5.4’s professional upgrades and variant options for serious workflows. Exploration of a one-million-token context window and what that means for large documents and codebases. Breakdown of token efficiency, speed, and benchmark gains in coding and knowledge work. Demonstrations of steerability, mid-response prompting, and deeper online research capabilities.
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Use 5.4 Pro For Intensive Professional Workflows
- Try GPT 5.4 Pro for heavy professional workflows and GPT 5.4 Thinking for broader tasks to get better coding, analysis, and long-running job performance.
- Jaeden recommends using 5.4 in professional settings after OpenAI's deals with consulting firms and tool integrations.
Million Token Context Enables Large Codebase Work
- GPT 5.4 Thinking expands context to a 1,000,000 token window enabling work with huge documents and large codebases.
- Jaeden Schafer highlights this as a major benefit for coding and long-running workflows across professional software tools, improving scale and relevance.
Token Efficiency Cuts Costs And Speeds Up Responses
- GPT 5.4 is more token efficient and faster, lowering operational cost compared to GPT 5.2.
- Schafer notes that software already using 5.2 should see cost reductions and speed gains when upgrading to 5.4.