Krux
April 25, 2026
OpenAI's GPT-5.5 Launches Today With $5 API Pricing
Published: April 25, 2026 at 12:28 AM
Updated: April 25, 2026 at 12:28 AM
100-word summary
OpenAI released GPT-5.5, its fastest model yet, with bigger context windows and stronger coding chops. The API costs $5 per million input tokens, six times cheaper than GPT-4's initial pricing. What you can do now: have it critique a manuscript across multiple passes while juggling code and PDFs, or build data visualization apps inside Codex. The context window jumps to 1 million tokens through the API. Over 85% of OpenAI's own staff already use Codex weekly. The catch? Tighter cybersecurity guardrails may throw false positives while OpenAI tunes them. This is OpenAI's clearest push yet toward a "super app" combining chat, code, and research tools.
What happened
OpenAI released GPT-5.5, its fastest model yet, with bigger context windows and stronger coding chops. The API costs $5 per million input tokens, six times cheaper than GPT-4's initial pricing. What you can do now: have it critique a manuscript across multiple passes while juggling code and PDFs, or build data visualization apps inside Codex. The context window jumps to 1 million tokens through the API. Over 85% of OpenAI's own staff already use Codex weekly. The catch? Tighter cybersecurity guardrails may throw false positives while OpenAI tunes them.
Why it matters
This is OpenAI's clearest push yet toward a "super app" combining chat, code, and research tools.