OpenAI launches limited preview of GPT-5.6 models Sol, Terra, and Luna following a US government request · Digg

OpenAI launches limited preview of GPT-5.6 models Sol, Terra, and Luna following a US government request · Digg

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Sam Altman@sama

Good new first: Sol is a smart, efficient, and a significant step forward. It is the same price as GPT-5.5. Also launching in the GPT-5.6 family is Terra, with 5.5-level performance at half the price.

Bad news: at the request of the US government, it is launching today in limited preview instead of the open access launch we were planning on. We are working with the government to get to general availability as fast as we can.

I think it is quite reasonable to roll out models--especially as they reach significant new levels of capability--in this way. It fits with our long-held strategy of iterative deployment. But this isn't quite the process that we think is optimal.

Now we will with the government to attempt to get to a transparent, reliable process for early access, and to ensure that as long as our safeguards work as intended we can release widely. We want to be a reliable, dependable partner that works with all stakeholders, and we also want to live by our mission of benefiting all of humanity. I believe the government shares most of our goals, and that they are overall doing a good job in a very difficult situation.

We will work as quickly as we can to get this model in your hands and we hope you will love it.

11h1.3M14.1K1.5K

Greg Brockman@gdb

GPT-5.6 Sol preview — it's a good model:

OpenAI@OpenAI

Introducing a limited preview of GPT-5.6 Sol, our next generation frontier model, as well as GPT-5.6 Terra, a balanced model for efficient, everyday work, and GPT-5.6 Luna, a fast and affordable model for high-volume work.

https://openai.com/index/previewing-gpt-5-6-sol/

14h556.3K6.4K536

Tibo@thsottiaux

New moon. New models. Welcome GPT-5.6 Sol, currently in limited preview.

OpenAI@OpenAI

Introducing a limited preview of GPT-5.6 Sol, our next generation frontier model, as well as GPT-5.6 Terra, a balanced model for efficient, everyday work, and GPT-5.6 Luna, a fast and affordable model for high-volume work.

https://openai.com/index/previewing-gpt-5-6-sol/

14h364.6K5.2K269

Matthew Berman@MatthewBerman

Limited preview - Dario ruined it for all of us.

OpenAI@OpenAI

Introducing a limited preview of GPT-5.6 Sol, our next generation frontier model, as well as GPT-5.6 Terra, a balanced model for efficient, everyday work, and GPT-5.6 Luna, a fast and affordable model for high-volume work.

https://openai.com/index/previewing-gpt-5-6-sol/

14h240.5K4.7K128

Pliny the Liberator 🐉󠅫󠄼󠄿󠅆󠄵󠄐󠅀󠄼󠄹󠄾󠅉󠅭@elder_plinius

welcome to the semi-permanent underclass

OpenAI@OpenAI

We believe in broad access and plan to make GPT-5.6 Sol, Terra, and Luna generally available in the coming weeks.

For now, at the request of the U.S. government, we’re starting with a limited preview among a small group of trusted partners in Codex and the API.

12h180.4K4K230

Matthew Berman@MatthewBerman

Dario ruined it for everyone

OpenAI@OpenAI

Introducing a limited preview of GPT-5.6 Sol, our next generation frontier model, as well as GPT-5.6 Terra, a balanced model for efficient, everyday work, and GPT-5.6 Luna, a fast and affordable model for high-volume work.

https://openai.com/index/previewing-gpt-5-6-sol/

10h154.5K1.9K362

Sam Altman@sama

Also, I am happy to answer questions if people have some.

Sam Altman@sama

Good new first: Sol is a smart, efficient, and a significant step forward. It is the same price as GPT-5.5. Also launching in the GPT-5.6 family is Terra, with 5.5-level performance at half the price.

Bad news: at the request of the US government, it is launching today in limited preview instead of the open access launch we were planning on. We are working with the government to get to general availability as fast as we can.

I think it is quite reasonable to roll out models--especially as they reach significant new levels of capability--in this way. It fits with our long-held strategy of iterative deployment. But this isn't quite the process that we think is optimal.

Now we will with the government to attempt to get to a transparent, reliable process for early access, and to ensure that as long as our safeguards work as intended we can release widely. We want to be a reliable, dependable partner that works with all stakeholders, and we also want to live by our mission of benefiting all of humanity. I believe the government shares most of our goals, and that they are overall doing a good job in a very difficult situation.

We will work as quickly as we can to get this model in your hands and we hope you will love it.

11h177.3K1.8K55

Sam Altman@sama

oh and also...750 token/sec coming to 5.6 sol in july!

Sam Altman@sama

Good new first: Sol is a smart, efficient, and a significant step forward. It is the same price as GPT-5.5. Also launching in the GPT-5.6 family is Terra, with 5.5-level performance at half the price.

Bad news: at the request of the US government, it is launching today in limited preview instead of the open access launch we were planning on. We are working with the government to get to general availability as fast as we can.

I think it is quite reasonable to roll out models--especially as they reach significant new levels of capability--in this way. It fits with our long-held strategy of iterative deployment. But this isn't quite the process that we think is optimal.

Now we will with the government to attempt to get to a transparent, reliable process for early access, and to ensure that as long as our safeguards work as intended we can release widely. We want to be a reliable, dependable partner that works with all stakeholders, and we also want to live by our mission of benefiting all of humanity. I believe the government shares most of our goals, and that they are overall doing a good job in a very difficult situation.

We will work as quickly as we can to get this model in your hands and we hope you will love it.

11h284.3K2.5K109

Matt Shumer@mattshumer_

The government is leading us down a very dangerous road.

This will dramatically worsen inequality.

OpenAI@OpenAI

Introducing a limited preview of GPT-5.6 Sol, our next generation frontier model, as well as GPT-5.6 Terra, a balanced model for efficient, everyday work, and GPT-5.6 Luna, a fast and affordable model for high-volume work.

https://openai.com/index/previewing-gpt-5-6-sol/

14h270.4K1.8K126

ben hylak@benhylak

goodbye benchmark-maxxing hello benchmark-minimizing

mythos is the new bar, and you must be very careful not to pass it

OpenAI@OpenAI

Introducing a limited preview of GPT-5.6 Sol, our next generation frontier model, as well as GPT-5.6 Terra, a balanced model for efficient, everyday work, and GPT-5.6 Luna, a fast and affordable model for high-volume work.

https://openai.com/index/previewing-gpt-5-6-sol/

12h115.2K1.5K133

swyx 🔜 @aiDotEngineer@swyx

have been testing 5.6 for a while and VERY happy with it. DO NOT view this as just a “cyber” release, it is the new sota workhorse model, completely replacing opus for 80% of tasks for me

> GPT‑5.6 Sol is competitive with Mythos Preview using only ~1/3 of the output tokens.

this is a very key line. OAI posttraining team has shifted the reasoning pareto frontier by A LOT and they arent saying anything about how they did it because this is the single most important competitive advantage right now in agentic models for enterprise.

team really locked in on this one, i honestly wish they just went ahead and called it GPT6 because this minor semver bump is far larger than even the 5.4->5.5 jump which itself was the single most successful openai launch since 4o/o1

OpenAI@OpenAI

Introducing a limited preview of GPT-5.6 Sol, our next generation frontier model, as well as GPT-5.6 Terra, a balanced model for efficient, everyday work, and GPT-5.6 Luna, a fast and affordable model for high-volume work.

https://openai.com/index/previewing-gpt-5-6-sol/

13h75.6K1K156

Chubby♨️@kimmonismus

OpenAI priced GPT-5.6 Sol (largest Model) closer to Claude Opus 4.8 than to Anthropic’s restricted Mythos 5. Price war started.

Sol comes in at $5 input / $30 output per 1M tokens. For comparison:

Claude Opus 4.8: $5 / $25 Claude Mythos 5: $10 / $50 GPT-5.6 Terra: $2.50 / $15 GPT-5.6 Luna: $1 / $6

That makes Sol more expensive than Opus 4.8 on output, but far below Mythos 5 on both input and output.

And: "Terra has competitive performance to GPT‑5.5 while being 2x cheaper and Luna brings strong capability at our lowest cost."

They are also releasing Sol on Cerebras-Chips:

"We're also launching GPT‑5.6 Sol on Cerebras at up to 750 tokens per second in July, bringing frontier intelligence to customers at unprecedented speed."

A truly exciting release. OpenAI is entering the price war with this one.

And I love the names: Sol, Terra, Luna. Sounds fantastic!

Hyped for the release!

OpenAI@OpenAI

Sol is our new flagship and a step function better than GPT-5.5.

Terra delivers performance competitive to GPT-5.5 at 2x lower cost.

Luna is our most cost-efficient model, delivering strong capability at our lowest cost.

Together, the GPT-5.6 family gives people and developers more choice in how they balance intelligence, speed, and cost.

13h79.5K870116

Zephyr@zephyr_z9

This is so sad

OpenAI@OpenAI

We believe in broad access and plan to make GPT-5.6 Sol, Terra, and Luna generally available in the coming weeks.

For now, at the request of the U.S. government, we’re starting with a limited preview among a small group of trusted partners in Codex and the API.

14h230.5K1.2K81

Yu Bai@yubai01

GPT-5.6 is a strong model. We are already heavily relying on it in Codex, can't wait to make it available to everyone.

Other highlights: * Three new models lined up, Terra/Luna are closer to the flagship model than previous generations of mini/nanos -- no longer "mini models" per se * Max reasoning mode -- thinks longer * Ultra mode -- uses subagents automatically

OpenAI@OpenAI

Sol is our new flagship and a step function better than GPT-5.5.

Terra delivers performance competitive to GPT-5.5 at 2x lower cost.

Luna is our most cost-efficient model, delivering strong capability at our lowest cost.

Together, the GPT-5.6 family gives people and developers more choice in how they balance intelligence, speed, and cost.

13h67.2K60489

Justine Moore@venturetwins

"You thought you could just ship your frontier model?"

OpenAI@OpenAI

We believe in broad access and plan to make GPT-5.6 Sol, Terra, and Luna generally available in the coming weeks.

For now, at the request of the U.S. government, we’re starting with a limited preview among a small group of trusted partners in Codex and the API.

13h54.4K74068

gabriel@gabriel1

GET MOGGGEEDDDDD

OpenAI@OpenAI

Introducing a limited preview of GPT-5.6 Sol, our next generation frontier model, as well as GPT-5.6 Terra, a balanced model for efficient, everyday work, and GPT-5.6 Luna, a fast and affordable model for high-volume work.

https://openai.com/index/previewing-gpt-5-6-sol/

12h87.1K76947

Matthew Berman@MatthewBerman

I’ll be making more open source tutorials going forward.

Matthew Berman@MatthewBerman

Dario ruined it for everyone

9h21.8K52151

Matt Shumer@mattshumer_

Welcome to the new, confusing era of AI.

If the government allows, you get access.

If not, welp. You’re shit out of luck.

OpenAI@OpenAI

Introducing a limited preview of GPT-5.6 Sol, our next generation frontier model, as well as GPT-5.6 Terra, a balanced model for efficient, everyday work, and GPT-5.6 Luna, a fast and affordable model for high-volume work.

https://openai.com/index/previewing-gpt-5-6-sol/

14h60.4K63925

Lisan al Gaib@scaling01

GPT-5.6 Pricing: - Sol: $5 / $30 - Terra: $2.5 / $15 - Luna: $1 / $6

OpenAI will also launch GPT-5.6 on Cerebras at up to 750 tokens/s in July

Lisan al Gaib@scaling01

OpenAI released the official GPT-5.6 Preview Blog: https://openai.com/index/previewing-gpt-5-6-sol/

14h44K52055

OpenAI@OpenAI

We believe in broad access and plan to make GPT-5.6 Sol, Terra, and Luna generally available in the coming weeks.

For now, at the request of the U.S. government, we’re starting with a limited preview among a small group of trusted partners in Codex and the API.

14h30.8K61625