GPT-5.6 Sol
GPT-5.6 Sol is OpenAI's flagship GPT-5.6 model in Cursor. It is the strongest of the Sol, Terra, and Luna family: persistent on long-running agent work, fast enough for interactive sessions, and notably concise in how it communicates.
Strengths
- Highest intelligence in the GPT-5.6 family for challenging coding and reasoning tasks.
- Strong persistence on long-running work; it keeps going through multi-hour agent sessions instead of stopping early.
- Clean, direct communication with less comment and final-message slop than many Claude models.
- Concise and easy to skim; strong as a rubber-duck partner for planning and debugging.
- Competitive speed relative to similarly intelligent models.
Limitations
- Higher per-token pricing than Terra and Luna.
- Can over-use subagents on mid-sized tasks.
- Sometimes waits for an explicit "do it" after agreeing with feedback, instead of executing immediately.
- Instruction-following can lag the strongest Claude models on some agent behavior evals.
Tools
GPT-5.6 Sol has access to all agent tools when used with Cursor including:
Find files by name, read directory structures, and grep for patterns.
Generate search queries and fetch results from the web.
Read file contents, including images for vision-capable models.
Suggest edits and apply them automatically.
Execute terminal commands and monitor output.
Control a browser to take screenshots, test applications, and verify visual changes. See the Browser documentation.
Generate images from text descriptions or reference images.
Ask clarifying questions while continuing to work in the background.
Retrieve rules based on type and description.
Learn more about how tools work and tool calling fundamentals.
Pricing
Cursor plans include two usage pools. GPT-5.6 Sol draws from the third-party Other Models pool, which charges at the rates below. Individual plans include at least $20 of third-party Other Models usage each month (more on higher tiers). All prices are per million tokens.
| Name | ||||
|---|---|---|---|---|
| $5 | $6.25 | $0.5 | $30 | |
| $10 | $12.5 | $1 | $60 | |
| $10 | $12.5 | $1 | $45 |
A Fast mode tier (gpt-5.6-sol-fast) is available for priority processing at 2x the standard rates.
When input exceeds 272k tokens (long context), input pricing doubles and output pricing is 1.5x the standard rate.