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GPT-6.1 Sol vs GPT-6.1 Terra: which delivered after 7 days?
GPT-6.1 Sol is stamped Delivered; GPT-6.1 Terra is still Too early to call, so this comparison isn't settled yet.
| GPT-6.1 Sol | GPT-6.1 Terra | |
|---|---|---|
| Verdict | Delivered | Too early |
| Claims held | 2 | 3 |
| Claims mixed | 3 | 0 |
| Claims failed | 0 | 1 |
| Claims unclear | 0 | 0 |
| User reports | 7 | 2 |
| Launched | 29 Sept 2026 | 26 Oct 2026 |
| Last stamped | 30 Oct 2026 | 30 Oct 2026 |
No. 004 · OpenAI
GPT-6.1 Sol
Near-Astra performance for less money holds in independent tests, and the prices are as listed. Day-one access was patchy and Ultrafast is top-plan only.
- Launched
- 29 Sept 2026
- Stamped
- 30 Oct 2026
- Claims
- ✓2 held · ~3 mixed · ✗0 failed · ?0 unclear
- Reports
- 7 (0 praise · 4 problem · 3 mixed)
What they claimed
“GPT-6.1 Sol is available starting today to all Plus, Pro, Business, Enterprise, and Edu users in ChatGPT Work and Codex.”~ Mixed
“In the coming days, we’ll also offer GPT-6.1 Sol Ultrafast, with up to 8x faster token generation compared to its standard speed in Codex.”~ Mixed
“GPT-6.1 Sol is more transparent about its limitations and more reliable at respecting user intent and safety constraints.”~ Mixed
“We’re introducing GPT-6.1 Sol, an upgrade to GPT-6 Sol that nearly matches GPT-6 Astra’s intelligence on agentic coding, computer use, and professional work at one-fifth of Astra’s standard input and output token prices.”✓ Holds
“Its standard API prices are $2 per million input tokens, $0.10 per million cached input tokens, and $10 per million output tokens.”✓ Holds
No. 011 · OpenAI
GPT-6.1 Terra
Day 4 of 7Cheap and the coding gain is real, but independent timing finds it about 15 to 25% faster than Sol, nowhere near 3x.
- Launched
- 26 Oct 2026
- Stamped
- 30 Oct 2026
- Claims
- ✓3 held · ~0 mixed · ✗1 failed · ?0 unclear
- Reports
- 2 (0 praise · 0 problem · 2 mixed)
What they claimed
“At max effort, Terra is over three times as token efficient as Claude Opus 5.5, and one-fourth its price per token, resulting in a ~9x lower cost per task.”✓ Holds
“Terra is also much quicker, completing tasks over three times faster than both GPT-6 Astra and GPT-6.1 Sol.”✗ Fails
“At maximum reasoning effort, GPT‑6.1 Terra solves 50.3% of tasks, more than double GPT‑5.6 Terra’s published score of 21.5%.”✓ Holds
“Standard API pricing is $1 per million input tokens, $0.05 per million cached input tokens, and $5 per million output tokens.”✓ Holds
Both stamps come from the public user reports linked on each receipt, under the same method. Verdicts are opinion and are never paid for.
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