GPT-6.1 Sol
Knows up to April 2026Missing 1,863 events
gpt-6.1-sol
$2 in, $10 out per 1M tokens
GPT-6.1 Terra
OpenAI’s cheaper everyday model for computer use, visual reasoning and writing, released Oct 26, 2026.
Model idgpt-6.1-terra
Price$1 in, $5 out per 1M tokens
Checked26 October 2026
Knows up to June 2026
1,795events after its cutoff
81 historic, 409 major. 136 days of news.
It launched on 26 October 2026, already missing 1,368 of them.
How to call it
3 ways to use GPT-6.1 Terra, with the model id each provider expects.
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| OpenAI API | gpt-6.1-terra |
https://api.openai.com/v1/responses |
developers.openai.com |
| Web app (ChatGPT Work, Plus/Pro/Enterprise/Edu) | chatgpt.com | ||
| Codex | developers.openai.com |
Pricing
| Input | $1 per 1M tokens |
|---|---|
| Cached input | $0.05 per 1M tokens |
| Output | $5 per 1M tokens |
| Cache write | $1.25 per 1M tokens |
As published: “per 1M tokens (USD), standard tier”. Note: cache writes $1.25 (30-minute retention) or $2.50 (12-hour retention); prompts >272K input tokens billed at 2x input/cache and 1.5x output for the whole request.
Source: developers.openai.com, checked 26 October 2026.
Specs
- Input
- Text and images
- Output
- Text
- Context window
- 1,050,000 tokens
- Max output
- 128,000 tokens
- Open weights
- No
- Licence
- Proprietary
- Training cutoff
- June 2026
- Released
- 26 October 2026
- Status
- Current
- Type
- Reasoning model
What stands out
What its maker marketed at launch, and what people found later, each with its source.
Computer use at half the mid-tier price
$1/$5 per 1M tokens with the computer_use tool in the Responses API; OpenAI says it finishes computer-use tasks over 3x faster than GPT-6 Astra and GPT-6.1 Sol (vendor claim).
Near-Sol intelligence per dollar
Artificial Analysis Intelligence Index 48 at max effort (GPT-6.1 Sol 52) for about $0.40 per index task; 90.9 output tokens/s.
Fewer guesses when unsure
AA-Omniscience: guesses instead of abstaining 38% of the time, vs 88% for GPT-5.6 Terra (per The Decoder’s reading of Artificial Analysis).
Critical cyber classification for a mid-size model
System card addendum: treated as Critical in cybersecurity and High in biology/chemistry, with GPT-6 Astra’s safeguard stack; ExploitBench 97.10%.
Four assistants, one scale
GPT-6.1 Terra is added as a fifth row. Each row runs from what the model knows (graphite) through the months between its cutoff and its launch (hatched) to today (pink).
- GPT-6 Astra 271 at launch, 1,863 today
- Claude Opus 5.5 372 at launch, 1,795 today
- Gemini 4 Hydrogen 1,863 at launch, 1,889 today
- Grok 4.7 387 at launch, 1,829 today
- GPT-6.1 Terra 1,368 at launch, 1,795 today
Show as a table
| Model | Cutoff | Released | Missing at launch | Missing today |
|---|---|---|---|---|
| GPT-6 Astra | April 2026 | 3 September 2026 | 271 | 1,863 |
| Claude Opus 5.5 | June 2026 | 22 September 2026 | 372 | 1,795 |
| Gemini 4 Hydrogen | March 2026 | 12 November 2026 | 1,863 | 1,889 |
| Grok 4.7 | May 2026 | 21 September 2026 | 387 | 1,829 |
| GPT-6.1 Terra | June 2026 | 26 October 2026 | 1,368 | 1,795 |
Notes
Mid-size GPT-6 model between GPT-6 Luna and GPT-6.1 Sol; successor to GPT-5.6 Terra. reasoning.effort none/low/medium(default)/high/xhigh/max. Max input 922K tokens. Tool calling needs the Responses API (tools: web/file search, image generation, code interpreter, hosted shell, apply patch, skills, computer use, MCP, tool search). No audio/video input. Rate limits up to 15,000 RPM / 40M TPM (Grow tier). OpenAI still recommends GPT-6.1 Sol or GPT-6 Astra for the hardest coding.