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- GPT-6 Astra vs. GPT-6 Luna
OpenAILLM matchup
GPT-6 Astravs.GPT-6 Luna
Is the higher price worth it?
GPT-6 Astra performs better than GPT-6 Luna, but costs 100 times as much.
GPT-6 Astra
Rank 6
GPT-6 Luna
Rank 35
GPT-6 Astra
GPT-6 Luna
GPT-6 Astra
GPT-6 Luna
GPT-6 Astra
Rank 1 of 785
GPT-6 Luna
Rank 30 of 785
Above 272,000 tokens of context, GPT-6 Astra costs more: $20 input and $75 output per 1M tokens. Above 272,000 tokens of context, GPT-6 Luna costs more: $0.20 input and $0.75 output per 1M tokens.
Choose GPT-6 Astra for
Choose GPT-6 Luna for
No clear advantage
On this page
Where is the difference?
Strengths at a glance
GPT-6 AstraGPT-6 LunaMedian of all ranked models
95 % range: GPT-6 Astra 116.1 to 132.6, GPT-6 Luna 94.5 to 100.5.
The same values and verdicts as the bars below. In the close-up the net starts at 80 points, just below the weaker model's lowest value; the reference group average is 100.
GPT-6 Astra is ahead in 10 of 10 areas, GPT-6 Luna in none.
GPT-6 Astra 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 Astra vs. GPT-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.
| Effort | GPT-6 Astra | GPT-6 Luna | Gap | Verdict | Test series |
|---|---|---|---|---|---|
| low | 110.7 | 65.2 | 48.6 | GPT-6 Astra ahead | 11 |
| medium | 116.6 | 82.4 | 37.7 | GPT-6 Astra ahead | 11 |
| high | 119.6 | 87.1 | 35.7 | GPT-6 Astra ahead | 11 |
| xhigh | 120.3 | 90.6 | 32.6 | GPT-6 Astra ahead | 11 |
| max | 121.3 | 96.3 | 24.8 | GPT-6 Astra ahead | 13 |
| Overall index (max vs. max) | 121.3 | 96.3 | 25.1 | GPT-6 Astra 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 Astra

Sep 7, 2026 · 142 s · $0.20
Test details
- Run date
- Sep 7, 2026
- API provider
- openrouter
- Requested API model
- openai/gpt-6-astra
- Reasoning setting
- high
- Token limit including reasoning
- 8,192 tokens
- Output tokens
- 3,966 tokens
- Cost of the attempt
- $0.1985
- Response time
- 141.7 s
- API model reported in response
- openai/gpt-6-astra
- Pinned endpoint
- OpenAI | openai/gpt-6-astra-20260903
- 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-6 Luna

Oct 1, 2026 · 47 s · $0.0022
Test details
- Run date
- Oct 1, 2026
- API provider
- openrouter
- Requested API model
- openai/gpt-6-luna
- Reasoning setting
- high
- Token limit including reasoning
- 8,192 tokens
- Output tokens
- 4,493 tokens
- Cost of the attempt
- $0.0022
- Response time
- 46.7 s
- API model reported in response
- openai/gpt-6-luna
- Pinned endpoint
- OpenAI | openai/gpt-6-luna-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.
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 Astra
Unavailable in this round
GPT-6 Luna
Unavailable in this round
GPT-6 Astra and GPT-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 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 Astra is more popular than GPT-6 Luna: 83 to 60 out of 100.
Over time
Weekly values from October 18, 2026 to November 7, 2026
GPT-6 AstraGPT-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 Astra | GPT-6 Luna |
|---|---|---|
| Intelligence | ||
| Overall indexpoints, 100 = reference group average, higher is better | 121.3 | 96.3 |
| Rank | Rank 6 of 92 | Rank 35 of 92 |
| Price per 1M tokens | ||
| Inputwhat you send | $10above 272,000 tokens: $20 | $0.10above 272,000 tokens: $0.20 |
| Outputwhat the model writes | $50above 272,000 tokens: $75 | $0.50above 272,000 tokens: $0.75 |
| Cost per task (own tests)average of 3 original-protocol tasks both models passed (SVG short test not included) | $0.26 | $0.003 |
| Speed | ||
| Tokens per second | 43 | 101 |
| Popularity | ||
| Popularitysearch, usage and mentions, 0 to 100 | 83Rank 1 of 785 | 60Rank 30 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 30, 2026 | May 18, 2026 |
| Released | Sep 3, 2026 | Sep 22, 2026 |
| Availability | Limited access | 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 103.4, rank 20$0.10 input and $0.50 output per 1M tokens
GPT-6 Astra vs. Claude Haiku 5.5Overall index 126.1, rank 1$4 input and $20 output per 1M tokens
GPT-6 Astra vs. Claude Opus 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 AstraB: GPT-6 Luna
Show 54 more benchmarks
More comparisons
Compare GPT-6 Astra and GPT-6 Luna with the models people compare them with most often.
Compare another matchup
Predecessor and successor
The most popular comparisons
- 1Claude Opus 5.5 vs. GPT-6 Astra
- 2GPT-6 Luna vs. GPT-5.6 Terra
- 3Claude Haiku 5.5 vs. GPT-6 Luna
- 4GPT-6.1 Sol vs. GPT-6 Astra
- 5GPT-6 Luna vs. Gemini 3.8 Flash
- 6GPT-6 Luna vs. DeepSeek-V4.1-Flash
- 7GPT-6 Luna vs. GPT-5.4 mini
- 8GPT-6 Luna vs. GLM-5.3-Flash
- 9GPT-6 Astra vs. Kimi K3
Show all 76 comparisons
- 10GPT-6 Astra vs. DeepSeek-V4.1-Flash
- 11GPT-6 Astra vs. GPT-5.6 Terra
- 12GPT-6 Astra vs. GPT-6 Sol
- 13GPT-6.1 Sol vs. GPT-6 Luna
- 14GPT-6 Luna vs. DeepSeek-V4-Pro
- 15Claude Sonnet 5 vs. GPT-6 Luna
- 16GPT-6 Luna vs. Gemini 3.5 Flash-Lite
- 17Claude Haiku 4.5 vs. GPT-6 Luna
- 18GPT-6 Astra vs. DeepSeek-V4-Flash
- 19Claude Sonnet 4.6 vs. GPT-6 Luna
- 20GPT-6 Luna vs. GPT-5.4
- 21GPT-6 Luna vs. Gemini 3.1 Pro Preview
- 22Claude Sonnet 5.5 vs. GPT-6 Luna
- 23GPT-6 Luna vs. DeepSeek V4.1 Flash 1017
- 24Claude Haiku 5.5 vs. GPT-6 Astra
- 25Claude Opus 5 vs. GPT-6 Astra
- 26Claude Opus 4.8 vs. GPT-6 Luna
- 27GPT-6 Luna vs. GPT-5.6 Sol
- 28GPT-6 Astra vs. Qwen 3.8 27B
- 29GPT-6 Astra vs. GLM-5.3-Flash
- 30Claude Opus 4.8 vs. GPT-6 Astra
- 31Claude Fable 5.1 vs. GPT-6 Astra
- 32GPT-6 Luna vs. Grok 4.7
- 33GPT-6 Luna vs. Gemini 3.6 Flash
- 34GPT-6 Sol vs. GPT-6 Luna
- 35Claude Opus 4.6 vs. GPT-6 Luna
- 36Claude Sonnet 4.5 vs. GPT-6 Luna
- 37GPT-6 Astra vs. Gemini 4 Argon
- 38GPT-6 Luna vs. Muse Spark 1.3
- 39GPT-6 Luna vs. DeepSeek-V4-Flash
- 40Claude Opus 5.5 vs. GPT-6 Luna
- 41GPT-6 Astra vs. GLM-5.3
- 42GPT-6 Astra vs. Gemini 3.8 Flash
- 43GPT-6 Luna vs. Qwen 3.8 27B
- 44Claude Opus 4.6 vs. GPT-6 Astra
- 45GPT-6 Astra vs. Qwen 3.8 Max 0902
- 46GPT-6 Luna vs. Qwen 3.8 Max 0902
- 47GPT-6 Astra vs. DeepSeek V4.1 Flash 1017
- 48Claude Sonnet 5 vs. GPT-6 Astra
- 49Claude Sonnet 5.5 vs. GPT-6 Astra
- 50GPT-6 Luna vs. GLM-5.2
- 51Claude Sonnet 4.6 vs. GPT-6 Astra
- 52GPT-6 Luna vs. GPT-5.5
- 53GPT-6 Luna vs. Gemini 3.7 Flash
- 54GPT-6 Astra vs. GLM-5.2
- 55Claude Fable 5.1 vs. GPT-6 Luna
- 56GPT-6 Luna vs. GLM-5.3
- 57GPT-6 Luna vs. Grok 4.6
- 58Claude Fable 5 vs. GPT-6 Astra
- 59Claude Opus 4.5 vs. GPT-6 Luna
- 60GPT-6 Astra vs. GPT-5.4
- 61GPT-6 Luna vs. MiMo-V2.5
- 62GPT-6.1 Terra vs. GPT-6 Astra
- 63Claude Fable 5 vs. GPT-6 Luna
- 64GPT-6 Luna vs. Mistral Large 4
- 65GPT-6 Luna vs. Gemini 3.5 Flash
- 66GPT-6.1 Terra vs. GPT-6 Luna
- 67Claude Opus 4.7 vs. GPT-6 Astra
- 68GPT-6 Astra vs. Muse Wonder
- 69Claude Opus 4.5 vs. GPT-6 Astra
- 70GPT-6 Luna vs. Mistral Medium 3.5
- 71GPT-6 Luna vs. Grok 4.5
- 72Claude Opus 4.7 vs. GPT-6 Luna
- 73GPT-6 Astra vs. Muse Wonder Full
- 74GPT-6 Astra vs. Gemini 4 Carbon
- 75GPT-6 Luna vs. Gemini 4 Argon
- 76GPT-6 Astra vs. Kimi K3.1 Pro