OpenAILLM matchup
GPT-6 Solvs.GPT-5.6 Terra
Is the higher price worth it?
GPT-6 Sol performs better than GPT-5.6 Terra and is cheaper: GPT-5.6 Terra costs 1.2 times as much for output and about the same for input.
GPT-6 Sol
Rank 13
GPT-5.6 Terra
Rank 26
GPT-6 Sol
GPT-5.6 Terra
GPT-6 Sol
GPT-5.6 Terra
GPT-6 Sol
Rank 3 of 785
GPT-5.6 Terra
Rank 19 of 785
Above 272,000 tokens of context, GPT-6 Sol costs more: $4 input and $15 output per 1M tokens. Above 272,000 tokens of context, GPT-5.6 Terra costs more: $4 input and $18 output per 1M tokens.
Choose GPT-6 Sol for
Choose GPT-5.6 Terra for
No clear advantage
Where is the difference?
Strengths at a glance
GPT-6 SolGPT-5.6 TerraMedian of all ranked models
95 % range: GPT-6 Sol 112.2 to 117.6, GPT-5.6 Terra 98.6 to 109.3.
The same values and verdicts as the bars below. In the close-up the net starts at 85 points, just below the weaker model's lowest value; the reference group average is 100. Not in the net because a model has no own value there or the data are too thin: Legal.
GPT-6 Sol is ahead in 8 of 10 areas, GPT-5.6 Terra in none.
GPT-6 Sol ahead: 8level: 1too little data: 1
Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.
Show 4 more areas that do not count toward the overall index
Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.
GPT-6 Sol vs. GPT-5.6 Terra at the same effort
Both models measured at the same reasoning efforts. This shows whether a lead comes from the model or only from more compute.
| Effort | GPT-6 Sol | GPT-5.6 Terra | Gap | Verdict | Test series |
|---|---|---|---|---|---|
| max | 110.5 | 100.7 | 10.8 | GPT-6 Sol ahead | 12 |
| Overall index (max vs. max) | 110.5 | 100.7 | 9.8 | GPT-6 Sol ahead |
Gap and verdict compare only the Artificial Analysis test series in which both models are measured at that effort. Tied below 3 points, ahead only beyond two standard errors. The single values rest on all test series of each model, so their difference can deviate from the gap.
Which model for which task?
Everyday tasks, translated from the area values above. Each row names the values it rests on.
See for yourself: same task, one attempt
The same prompt for both models. We show the latest attempt without fixes; it does not count toward the overall index.
GPT-6 Sol
Oct 1, 2026 · 80 s · $0.04
Test details
- Run date
- Oct 1, 2026
- API provider
- openrouter
- Requested API model
- openai/gpt-6-sol
- Reasoning setting
- high
- Token limit including reasoning
- 8,192 tokens
- Output tokens
- 4,389 tokens
- Cost of the attempt
- $0.0439
- Response time
- 80.5 s
- API model reported in response
- openai/gpt-6-sol
- Pinned endpoint
- OpenAI | openai/gpt-6-sol-20260922
- Temperature
- Provider default
- Test protocol
- community-visual-tests-v1
- Technical checks
- Passed, not a quality rating
Visually reviewed. This individual test does not establish overall model quality.
GPT-5.6 Terra
Sep 7, 2026 · 65 s · $0.04
Test details
- Run date
- Sep 7, 2026
- API provider
- openrouter
- Requested API model
- openai/gpt-5.6-terra
- Reasoning setting
- high
- Token limit including reasoning
- 8,192 tokens
- Output tokens
- 3,373 tokens
- Cost of the attempt
- $0.0405
- Response time
- 64.6 s
- API model reported in response
- openai/gpt-5.6-terra
- Pinned endpoint
- OpenAI | openai/gpt-5.6-terra-20260709
- Temperature
- Provider default
- Test protocol
- community-visual-tests-v1
- Technical checks
- Passed, not a quality rating
Visually reviewed. This individual test does not establish overall model quality.
SVG short test
SVG short test
One SVG task with the same fixed settings for every model, without hidden thinking.
Prompt
Return only one standalone SVG of a pelican riding a bicycle. Use viewBox="0 0 800 600", simple shapes, two clearly visible wheels and a recognizable pelican with a long beak. At most 30 SVG elements and 1800 characters. No Markdown, explanations, comments, scripts, animation, CSS or external resources.
GPT-6 Sol
Unavailable in this round
GPT-5.6 Terra
Unavailable in this round
GPT-6 Sol and GPT-5.6 Terra in the overall index
Every model with a place in the overall index, both models of this matchup highlighted. You can add or hide other models.
Overall index (Gradually Meta-Score v4)
20 of 92 models
4 models in this view are measured at a lower reasoning effort than max in the overall index. Dashed column: lower reasoning effort than the top.
Popularity compared
How often the models are searched for, used and mentioned, on a scale from 0 to 100.
GPT-6 Sol is more popular than GPT-5.6 Terra: 73 to 64 out of 100.
Over time
Weekly values from October 18, 2026 to November 7, 2026
GPT-6 SolGPT-5.6 Terra
All data side by side
The better value is bold. For the overall index only when the gap is clear.
| Metric | GPT-6 Sol | GPT-5.6 Terra |
|---|---|---|
| Intelligence | ||
| Overall indexpoints, 100 = reference group average, higher is better | 110.5 | 100.7 |
| Rank | Rank 13 of 92 | Rank 26 of 92 |
| Price per 1M tokens | ||
| Inputwhat you send | $2above 272,000 tokens: $4 | $2above 272,000 tokens: $4 |
| Outputwhat the model writes | $10above 272,000 tokens: $15 | $12above 272,000 tokens: $18 |
| Cost per task (own tests)average of 3 original-protocol tasks both models passed (SVG short test not included) | $0.044 | $0.047 |
| Speed | ||
| Tokens per second | 111 | 100 |
| Popularity | ||
| Popularitysearch, usage and mentions, 0 to 100 | 73Rank 3 of 785 | 64Rank 19 of 785 |
| Technical | ||
| Context windowhow much text the model reads at once | 1.05 M tokens≈ 1,580 A4 pages | 1.05 M tokens≈ 1,580 A4 pages |
| Knowledge cutoff | Apr 20, 2026 | Feb 16, 2026 |
| Released | Sep 22, 2026 | Jul 9, 2026 |
| Availability | Active | Active |
| Open weights | no | no |
Prices without caching or batch discounts · Page count as a rule of thumb from Artificial Analysis
Is there a better choice?
Overall index 119.2, rank 7$2 input and $10 output per 1M tokens
GPT-5.6 Terra vs. GPT-6.1 SolOverall index 105.3, rank 19$1 input and $5 output per 1M tokens
GPT-6 Sol vs. GPT-6.1 TerraOverall index 122.8, rank 4$2 input and $10 output per 1M tokens
GPT-6 Sol vs. Claude Sonnet 5.5Shared benchmarks
Single results from the same benchmark version, task and metric. A value is bold only with the same test setup and a clear gap.
A: GPT-6 SolB: GPT-5.6 Terra
Show 54 more benchmarks
More comparisons
Compare GPT-6 Sol and GPT-5.6 Terra with the models people compare them with most often.
Compare another matchup
Predecessor and successor
The most popular comparisons
- 1GPT-6 Luna vs. GPT-5.6 Terra
- 2GPT-6 Sol vs. GPT-5.6 Sol
- 3GPT-6 Sol vs. DeepSeek-V4.1-Flash
- 4GPT-6.1 Sol vs. GPT-5.6 Terra
- 5GPT-6 Sol vs. Gemini 3.8 Flash
- 6Claude Opus 5.5 vs. GPT-5.6 Terra
- 7Claude Sonnet 5.5 vs. GPT-5.6 Terra
- 8GPT-6 Astra vs. GPT-5.6 Terra
- 9GPT-6 Astra vs. GPT-6 Sol
Show all 46 comparisons
- 10GPT-5.6 Terra vs. DeepSeek-V4.1-Flash
- 11GPT-6 Sol vs. GLM-5.3-Flash
- 12Claude Sonnet 5.5 vs. GPT-6 Sol
- 13GPT-6 Sol vs. Gemini 3.1 Pro Preview
- 14Claude Opus 4.8 vs. GPT-6 Sol
- 15GPT-6 Sol vs. GPT-5.4
- 16GPT-6 Sol vs. DeepSeek V4.1 Flash 1017
- 17GPT-6 Sol vs. Qwen 3.8 27B
- 18GPT-6 Sol vs. GPT-6 Luna
- 19GPT-6 Sol vs. Kimi K3.1 Pro
- 20Claude Sonnet 4.6 vs. GPT-6 Sol
- 21GPT-5.6 Terra vs. Grok 4.7
- 22GPT-6 Sol vs. Grok 4.7
- 23Claude Haiku 5.5 vs. GPT-6 Sol
- 24Claude Opus 5.5 vs. GPT-6 Sol
- 25GPT-6 Sol vs. Qwen 3.8 Max 0902
- 26Claude Sonnet 5 vs. GPT-6 Sol
- 27GPT-6 Sol vs. Kimi K3
- 28Claude Fable 5.1 vs. GPT-6 Sol
- 29Claude Opus 5 vs. GPT-5.6 Terra
- 30GPT-6 Sol vs. DeepSeek-V4-Pro
- 31GPT-6 Sol vs. GPT-5.6 Luna
- 32Claude Opus 5 vs. GPT-6 Sol
- 33Claude Sonnet 4.6 vs. GPT-5.6 Terra
- 34GPT-5.6 Terra vs. Gemini 3.7 Flash
- 35GPT-6 Sol vs. Mistral Large 4
- 36GPT-5.6 Terra vs. Gemini 3.1 Pro Preview
- 37GPT-6 Sol vs. Gemini 4 Argon
- 38GPT-6 Sol vs. Gemini 3.6 Flash
- 39Claude Opus 4.6 vs. GPT-6 Sol
- 40GPT-5.6 Terra vs. GPT-5.4
- 41GPT-6 Sol vs. Muse Wonder
- 42Claude Haiku 4.5 vs. GPT-6 Sol
- 43GPT-6 Sol vs. GPT-5.5
- 44GPT-6.1 Terra vs. GPT-6 Sol
- 45GPT-6 Sol vs. Gemini 4 Carbon
- 46GPT-5.6 Terra vs. Gemini 4 Argon