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- GPT-6.1 Sol vs. GPT-5.6 Luna
OpenAILLM matchup
GPT-6.1 Solvs.GPT-5.6 Luna
Is the higher price worth it?
GPT-6.1 Sol performs better than GPT-5.6 Luna, but costs 10 times (input) and 8.3 times (output) as much.
GPT-6.1 Sol
Rank 9
GPT-5.6 Luna
Rank 44
GPT-6.1 Sol
GPT-5.6 Luna
GPT-6.1 Sol
GPT-5.6 Luna
GPT-6.1 Sol
GPT-5.6 Luna
Rank 13 of 485
Above 272,000 tokens of context, GPT-6.1 Sol costs more: $4 input and $15 output per 1M tokens. Above 272,000 tokens of context, GPT-5.6 Luna costs more: $0.40 input and $1.80 output per 1M tokens.
Choose GPT-6.1 Sol for
No clear advantage for GPT-5.6 Luna.
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Where is the difference?
Strengths at a glance
GPT-6.1 SolGPT-5.6 LunaMedian of all ranked models
95 % range: GPT-6.1 Sol 113.7 to 127.5, GPT-5.6 Luna 86.6 to 106.2.
The same values and verdicts as the bars below. In the close-up the net starts at 75 points, just below the weaker model's lowest value; the reference group average is 100.
GPT-6.1 Sol is ahead in 10 of 10 areas, GPT-5.6 Luna in none.
GPT-6.1 Sol ahead: 10
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-6.1 Sol vs. GPT-5.6 Luna 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.
The gap compares 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.
Which model for which task?
Everyday tasks, translated from the area values above. Each row names the values it rests on.
GPT-6.1 Sol vs. GPT-5.6 Luna in our own test
The same prompt for both models. We show the latest attempt without fixes; it does not count toward the overall index.
GPT-6.1 Sol

Oct 1, 2026 · 84 s · $0.04
Test details
- Run date
- Oct 1, 2026
- API provider
- openrouter
- Requested API model
- openai/gpt-6.1-sol
- Reasoning setting
- high
- Token limit including reasoning
- 8,192 tokens
- Output tokens
- 3,583 tokens
- Cost of the attempt
- $0.0359
- Response time
- 83.6 s
- API model reported in response
- openai/gpt-6.1-sol
- Pinned endpoint
- OpenAI | openai/gpt-6.1-sol-20260929
- 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 Luna

Sep 7, 2026 · 50 s · $0.0038
Test details
- Run date
- Sep 7, 2026
- API provider
- openrouter
- Requested API model
- openai/gpt-5.6-luna
- Reasoning setting
- high
- Token limit including reasoning
- 8,192 tokens
- Output tokens
- 3,164 tokens
- Cost of the attempt
- $0.0038
- Response time
- 49.9 s
- API model reported in response
- openai/gpt-5.6-luna
- Pinned endpoint
- OpenAI | openai/gpt-5.6-luna-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-6.1 Sol
Unavailable in this round
GPT-5.6 Luna
Unavailable in this round
GPT-6.1 Sol and GPT-5.6 Luna 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 v5)
20 of 95 models
Popularity compared
How often the models are searched for, used and mentioned, on a scale from 0 to 100.
GPT-6.1 Sol has no popularity score yet.
Over time
Weekly values from October 18, 2026 to November 14, 2026
GPT-6.1 SolGPT-5.6 Luna
All data side by side
The better value is bold. For the overall index only when the gap is clear.
| Metric | GPT-6.1 Sol | GPT-5.6 Luna |
|---|---|---|
| Intelligence | ||
| Overall indexpoints, 100 = reference group average, higher is better | 117.5 | 93.8 |
| Rank | Rank 9 of 95 | Rank 44 of 95 |
| Price per 1M tokens | ||
| Inputwhat you send | $2above 272,000 tokens: $4 | $0.20above 272,000 tokens: $0.40 |
| Outputwhat the model writes | $10above 272,000 tokens: $15 | $1.20above 272,000 tokens: $1.80 |
| Cost per task (own tests)average of 3 original-protocol tasks both models passed (SVG short test not included) | $0.044 | $0.008 |
| Speed | ||
| Tokens per second | 54 | 86 |
| Popularity | ||
| Popularitysearch, usage and mentions, 0 to 100 | n/a | 83Rank 13 of 485 |
| 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 30, 2026 | Feb 16, 2026 |
| Released | Sep 29, 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 95.6, rank 40$0.10 input and $0.50 output per 1M tokens
GPT-6.1 Sol vs. GPT-6 LunaOverall index 110.5, rank 14$0.10 input and $0.50 output per 1M tokens
View profileOverall index 130.9, rank 1$8 input and $40 output per 1M tokens
GPT-6.1 Sol vs. Claude Fable 5.2Shared 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-6.1 SolB: GPT-5.6 Luna
Show 54 more benchmarks
More comparisons
Compare GPT-6.1 Sol and GPT-5.6 Luna with the models people compare them with most often.
Compare another matchup
Predecessor and successor
The most popular comparisons
- 1GPT-6.1 Sol vs. GPT-5.6 Sol
- 2Claude Opus 5.5 vs. GPT-5.6 Luna
- 3GPT-5.6 Luna vs. Gemini 3.8 Flash
- 4Claude Sonnet 5.5 vs. GPT-5.6 Luna
- 5GPT-6.1 Sol vs. GPT-6.1 Terra
- 6GPT-5.6 Luna vs. DeepSeek-V4.1-Flash
- 7GPT-5.6 Luna vs. Qwen 3.8 27B
- 8GPT-5.6 Luna vs. DeepSeek V4.1 Flash 1017
- 9GPT-5.6 Luna vs. GPT-5.4 mini
Show all 75 comparisons
- 10GPT-6 Astra vs. GPT-5.6 Luna
- 11GPT-5.6 Luna vs. Grok 4.7
- 12GPT-5.6 Luna vs. DeepSeek-V4-Flash
- 13GPT-6.1 Sol vs. GPT-6 Astra
- 14Claude Opus 5 vs. GPT-5.6 Luna
- 15Claude Haiku 5.5 vs. GPT-5.6 Luna
- 16GPT-5.6 Luna vs. Kimi K3
- 17GPT-5.6 Luna vs. GLM-5.3-Flash
- 18Claude Sonnet 5 vs. GPT-5.6 Luna
- 19GPT-6.1 Sol vs. GPT-5.6 Terra
- 20GPT-6 Sol vs. GPT-5.6 Luna
- 21GPT-5.6 Sol vs. GPT-5.6 Luna
- 22GPT-5.6 Luna vs. DeepSeek-V4-Pro
- 23GPT-5.6 Luna vs. Gemini 3.5 Flash-Lite
- 24GPT-5.6 Luna vs. Kimi K2.6
- 25Claude Sonnet 4.5 vs. GPT-5.6 Luna
- 26GPT-6.1 Sol vs. Gemini 3.8 Flash
- 27GPT-5.6 Luna vs. Gemini 3.1 Pro Preview
- 28GPT-5.6 Luna vs. Gemini 3.7 Flash
- 29GPT-5.6 Luna vs. MiMo-V2.5-Pro
- 30Claude Opus 5.5 vs. GPT-6.1 Sol
- 31Claude Sonnet 5.5 vs. GPT-6.1 Sol
- 32GPT-5.6 Luna vs. GPT-5.4
- 33GPT-5.6 Luna vs. Mistral Large 4
- 34Claude Opus 4.6 vs. GPT-5.6 Luna
- 35GPT-5.6 Luna vs. Gemini 3.5 Flash
- 36GPT-6.1 Sol vs. GLM-5.3-Flash
- 37GPT-6.1 Sol vs. GPT-6 Luna
- 38GPT-5.6 Luna vs. GPT-5.5
- 39Claude Haiku 4.5 vs. GPT-5.6 Luna
- 40GPT-6.1 Sol vs. Gemini 4 Carbon
- 41Claude Opus 4.5 vs. GPT-5.6 Luna
- 42GPT-6.1 Sol vs. DeepSeek-V4.1-Flash
- 43Claude Opus 4.8 vs. GPT-6.1 Sol
- 44GPT-6.1 Sol vs. Gemini 4 Argon
- 45GPT-6.1 Sol vs. Kimi K3.1 Pro
- 46GPT-6.1 Sol vs. DeepSeek-V4-Flash
- 47GPT-6.1 Sol vs. GPT-5.4 mini
- 48GPT-6.1 Sol vs. GPT-5.4
- 49GPT-6.1 Sol vs. DeepSeek V4.1 Flash 1017
- 50GPT-6.1 Terra vs. GPT-5.6 Luna
- 51GPT-6.1 Sol vs. Qwen 3.8 Max 0902
- 52Claude Sonnet 4.6 vs. GPT-6.1 Sol
- 53Claude Opus 4.6 vs. GPT-6.1 Sol
- 54Claude Sonnet 5 vs. GPT-6.1 Sol
- 55GPT-5.6 Luna vs. Gemini 4 Argon
- 56Claude Opus 5 vs. GPT-6.1 Sol
- 57GPT-6.1 Sol vs. GPT-5.5
- 58Claude Haiku 5.5 vs. GPT-6.1 Sol
- 59GPT-6.1 Sol vs. Grok 4.7
- 60Claude Sonnet 4.5 vs. GPT-6.1 Sol
- 61GPT-6.1 Sol vs. Gemini 3.5 Flash
- 62Claude Opus 4.7 vs. GPT-6.1 Sol
- 63GPT-6.1 Sol vs. GLM-5.3
- 64Claude Fable 5.2 vs. GPT-6.1 Sol
- 65GPT-6.1 Sol vs. Gemini 3.7 Flash
- 66GPT-6.1 Sol vs. Qwen 3.8 27B
- 67Claude Fable 5.1 vs. GPT-6.1 Sol
- 68GPT-6.1 Sol vs. Gemini 3.1 Pro Preview
- 69GPT-6.1 Sol vs. Gemini 3.6 Flash
- 70GPT-6.1 Sol vs. Kimi K3
- 71Claude Fable 5 vs. GPT-6.1 Sol
- 72GPT-6.1 Sol vs. DeepSeek-V4-Pro
- 73GPT-6.1 Sol vs. Muse Wonder
- 74Claude Haiku 4.5 vs. GPT-6.1 Sol
- 75Claude Opus 4.5 vs. GPT-6.1 Sol