GPT-5.6
OpenAI's July 8 2026 flagship — a point release over GPT-5.5 that closes most of the gap to Claude Opus 4.8. Artificial Analysis Intelligence Index 61.0 (up from GPT-5.5's 60.2), SWE-bench Verified 88.1%, SWE-bench Pro 66.4%, Terminal-Bench 2.1 72.9%. The headline change is agentic reliability: OpenAI reports far fewer dropped tool calls on long multi-step runs. Pricing is unchanged from GPT-5.5 at $5/$30 with a 90% cached-input discount, so the quality gain is effectively free for existing users.
400K
tokens
128K
tokens
$5
per 1M tokens
$30
per 1M tokens
96
tokens/sec
Jul 2026
2026-07-08
$17.50
per 1M tokens
5.6
quality per $
Capabilities
Benchmarks
About GPT-5.6
GPT-5.6 is a flagship AI model by OpenAI, released on July 8, 2026. It supports a context window of 400K tokens and can generate up to 128K output tokens.
At $5 per million input tokens and $30 per million output tokens, its blended cost of $17.50/1M tokens places it in the premium pricing tier. Its value score of 5.6 reflects the balance of quality and cost.
Using GPT-5.6 with Swfte
Access GPT-5.6 through Swfte Connect, our unified LLM gateway. Connect gives you a single API for 50+ models, with automatic routing, cost optimization, and fallback handling. You can also try GPT-5.6 in our AI Playground before integrating.