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News · OpenAI · September 29, 2026

Published . By , AI-assisted.

OpenAI DevDay 2026: GPT-6.1 Sol and what else OpenAI announced

At DevDay 2026 on September 29, OpenAI released GPT-6.1 Sol, an upgrade to GPT-6 Sol at the same API price: $2 per million input tokens and $10 per million output. GPT-6.1 Sol has been in llmwise since September 29, 2026: up to 125 GPT-6.1 Sol messages a month on Pro ($20).

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Facts checked against OpenAI: DevDay 2026 Recap, OpenAI: Introducing GPT-6.1 Sol, OpenAI: Introducing GPT-6 Sol and Luna. Updated .

What OpenAI announced

Each point is from OpenAI's own announcement unless its source says otherwise; the numbers link to the sources below.

  1. OpenAI calls DevDay 2026 its biggest yet, with more than 20 major announcements across ChatGPT, Codex, its models and new ways of working with AI.[1]

  2. OpenAI says GPT-6.1 Sol nearly matches GPT-6 Astra on agentic coding, computer use and professional work, at one-fifth of Astra's standard input and output token prices.[2]

  3. GPT-6.1 Sol's standard API prices are $2 per million input tokens, $0.10 per million cached input tokens and $10 per million output tokens; in OpenAI's API it's gpt-6.1-sol.[2]

  4. OpenAI says its cached input price is 95% below its standard input price and 50% below GPT-6 Sol's cached input price.[2]

  5. In ChatGPT, GPT-6.1 Sol is available from September 29 to Plus, Pro, Business, Enterprise and Edu users in ChatGPT Work and Codex; OpenAI says it isn't yet available in Chat.[2]

  6. OpenAI's price cards beside GPT-6.1 Sol list GPT-6 Astra at $10 per million input tokens and $50 output, and GPT-6 Luna at $0.10 and $0.50.[2]

  7. Ultrafast is a new speed tier for work where speed matters most: up to 6 times faster token generation in the API and up to 8 times (300 tokens a second) in Codex. GPT-6 Astra Ultrafast is out now; GPT-6.1 Sol Ultrafast is coming soon.[1]

  8. A new Pro 500 plan has ChatGPT's highest usage allowance, 25 times the ChatGPT Plus allowance, and includes Ultrafast.[1]

  9. Dots are OpenAI's new always-on agents, for ChatGPT Pro users and some Business workspaces in eligible markets.[1]

  10. With Sign in with ChatGPT, Plus and Pro users can use their plan's allowance in 16 partner tools, including Cognition's Devin, Notion, Vercel, T3, OpenClaw and Dactyl.[1]

  11. OpenAI's Agents API now supports computer use, so agents can work in software to complete tasks; in ChatGPT Work and Codex it's on Pro 500 and Enterprise.[1]

  12. For teams, ChatGPT adds Pages, a new kind of shared document, and ChatGPT Space, both on Pro, Business and Enterprise plans.[1]

Can you use GPT-6.1 Sol and GPT-6 Astra and GPT-6 Luna in llmwise?

What GPT-6.1 Sol and GPT-6 Astra and GPT-6 Luna cost you in llmwise, from the plans themselves.

GPT-6.1 Sol

GPT-6.1 Sol has been in llmwise since September 29, 2026. llmwise's catalog prices it at $2.00 per million tokens in and $10.00 out (OpenAI's list price). But a GPT-6.1 Sol message isn't billed by the token: the table below has its count on every plan.

GPT-6 Astra

GPT-6 Astra has been in llmwise since September 23, 2026. llmwise's catalog prices it at $10.00 per million tokens in and $50.00 out (OpenAI's list price). But a GPT-6 Astra message isn't billed by the token: the table below has its count on every plan.

GPT-6 Luna

GPT-6 Luna has been in llmwise since September 23, 2026. llmwise's catalog prices it at $0.10 per million tokens in and $0.50 out (OpenAI's list price). But a GPT-6 Luna message isn't billed by the token: the table below has its count on every plan.

GPT-6.1 Sol and GPT-6 Astra and GPT-6 Luna on every llmwise plan
PlanGPT-6.1 SolGPT-6 AstraGPT-6 Luna
Free ($0)Not in the trialNot in the trialNot in the trial
Plus ($10)Up to 62 a month, about $0.16 eachNot on Plus30 a day
Pro ($20)Up to 125 a month, about $0.16 eachUp to 31 a month, about $0.65 each60 a day
Max ($50)Up to 400 a month, about $0.13 eachUp to 100 a month, about $0.50 each120 a day
Ultra ($100)Up to 900 a month, about $0.11 eachUp to 225 a month, about $0.44 each200 a day
Studio ($200)Up to 2,000 a month, about $0.10 eachUp to 500 a month, about $0.40 each200 a day

A paid plan's month is one allowance the models share. So a monthly count is the most you get if the month goes to that model, and “each” is the plan's price divided by it. Every message's price is shown before you send it. Every plan.

The counts above come with each plan's fair-use limit, in AI cost a month: Plus's is $3.75, Pro's $7.50, Max's $20, Ultra's $42, Studio's $85. That leaves room for every message at typical sizes, less if messages run very long or research-heavy. Every limit, explained.

How did GPT-6.1 Sol and GPT-6 Astra and GPT-6 Luna do on our test prompts?

Beside Claude Sonnet 5.5 and Claude Sonnet 5, the models from other makers nearest in price per message.

GPT-6.1 Sol and GPT-6 Astra and GPT-6 Luna and the nearest-priced rivals: prompts passed
Prompt kindGPT-6.1 SolGPT-6 AstraGPT-6 LunaClaude Sonnet 5.5Claude Sonnet 5
Writing4 of 55 of 55 of 54 of 54 of 5
Math5 of 55 of 54 of 55 of 55 of 5
Summarization5 of 55 of 54 of 54 of 53 of 5
Data analysis5 of 55 of 55 of 55 of 54 of 5
Support replies2 of 53 of 54 of 54 of 55 of 5
In total46 of 5048 of 5047 of 5047 of 5046 of 50

All passed every prompt on coding, translation, SQL, answering from documents, and tool use. Through OpenRouter, in our test runs of September 27, 28, 29 and October 2, 7, 8, 9, 15, 2026; every model got the same prompts. Read the replies.

Sources

  1. [1] OpenAI: DevDay 2026 Recap, published .
  2. [2] OpenAI: Introducing GPT-6.1 Sol, published .
  3. [3] OpenAI: Introducing GPT-6 Sol and Luna, published .

Also from primary sources: OpenAI's GPT-6.1 Sol docs ($2 in and $10 out per million tokens, with cached input at 5% of the input rate). Read .

Bar chart: GPT-6.1 Sol messages on each llmwise plan. Plus ($10): up to 62 a month; Pro ($20): up to 125 a month; Max ($50): up to 400 a month; Ultra ($100): up to 900 a month; Studio ($200): up to 2,000 a month.
llmwise's published counts, plan by plan.

GPT-6.1 Sol: what it means for you

Can I use GPT-6.1 Sol in llmwise?

Yes, since September 29, 2026. GPT-6.1 Sol's messages a month: up to 62 on Plus ($10), 125 on Pro ($20), 400 on Max ($50), 900 on Ultra ($100), 2,000 on Studio ($200). It isn't in the free trial.

Can I use GPT-6 Astra in llmwise?

Yes, since September 23, 2026. GPT-6 Astra's messages a month: up to 31 on Pro ($20), 100 on Max ($50), 225 on Ultra ($100), 500 on Studio ($200). It isn't on Plus. It isn't in the free trial.

Can I use GPT-6 Luna in llmwise?

Yes, since September 23, 2026. GPT-6 Luna's messages a day: 30 on Plus ($10), 60 on Pro ($20), 120 on Max ($50), 200 on Ultra ($100), 200 on Studio ($200). It isn't in the free trial.

GPT-6.1 Sol is in llmwise

Up to 125 GPT-6.1 Sol messages a month on Pro ($20). Its count shows before you send.

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