OpenAI
GPT-6 Luna
GPT-6 Luna scores 1578 on WebDev Arena — rank 19 of 29 models we track with a published score and costs $0.20 per 1M blended tokens on the API — the best-scoring model at that price is Claude Haiku 5.5 (1586).
API price
$0.20
per 1M blended tokens
WebDev Arena
1578
rank 19 of 29 tracked models
Benchmark scores
| Benchmark | Score | Rank | Source | Published |
|---|---|---|---|---|
| WebDev Arena | 1578Max | #19 of 29 | LMArena | 2026-10-19 |
| FrontierCode | 42.4%max | #14 of 25 | Epoch AI Benchmarking Hub | 2026-09-22 |
The rank is among the 29 models we track with a published score for that benchmark — not the full leaderboard of the source, which lists many models we do not track. Where a source publishes several reasoning-effort settings, we show the model's best listed result.
API price
- Input
- $0.10 per 1M tokens
- Output
- $0.50 per 1M tokens
- Blended (3 input : 1 output)
- $0.20 per 1M tokens
- Above 272K input tokens
- $0.20 in / $0.75 out
Short context ≤272K input tokens; long-context rates apply above that.
Checked 2026-10-17 · source
Where it sits
WebDev Arena score against API price, with every model we can price and score on the same benchmark. Up and to the left is better.
- Value frontier
- No — a cheaper model scores higher
- Best model at $0.20 or less
- Claude Haiku 5.51586 · $0.20
Plans that include GPT-6 Luna
- ChatGPT Free
OpenAI
- ChatGPT Go
OpenAI
- OpenCode Go
OpenCode
- ChatGPT Plus
OpenAI
- ChatGPT Business
OpenAI
- ChatGPT Pro
OpenAI
Other OpenAI models
Common questions
- How much does GPT-6 Luna cost?
- $0.10 per 1M input tokens and $0.50 per 1M output tokens, which is $0.20 on a 3:1 input:output mix. The price was checked on 2026-10-17.
- Which subscription plans include GPT-6 Luna?
- 6 of the plans we track list it by name: ChatGPT Free (free), ChatGPT Go ($8/mo), OpenCode Go ($10/mo), ChatGPT Plus ($20/mo) and 2 more.
- How does GPT-6 Luna rank on WebDev Arena?
- It ranks 19 of 29 models we track with a published WebDev Arena score, at 1578. The rank is among the models on this site, not the full LMArena leaderboard.
- Is GPT-6 Luna the best value for coding?
- No. No tracked model scores higher on WebDev Arena and costs less. The best-scoring model at $0.20 or less is Claude Haiku 5.5.
- What is the cheapest way to use GPT-6 Luna?
- ChatGPT Go is the cheapest subscription we track that lists it, at $8/month. Per-token API pricing is listed separately above.