Opportuning off the chaos? GPT-5.6’s Three Major Models Fully Revealed, Scheduled for July 7th

Author: ASI Revelation; Source: Xin Zhi Yuan

GPT-5.6, to be released next week?

Just yesterday, netizens excitedly discovered: in the underlying code of the Codex app, model identifiers for GPT-5.6 Sol, Terra, and Luna, three sub-models, appeared.

Even more anticipated, a brand new "Speed Dial" function also appeared in the code.

This suggests that users can freely adjust between speed and quality according to their needs, which will undoubtedly bring an unprecedented control experience.

According to leaks, OpenAI has already set a hard deadline internally: the target release window for GPT-5.6 is directly set for next Tuesday (July 7) to July 9.

Why July 7? Because this day happens to be the vacuum period when the specific quota plan for Claude Fable 5 expires.

This is a precisely calculated commercial hunt down to the hour.

Recently, Anthropic has driven countless developers crazy with a series of messy operations, and Google Gemini 3.5 Pro was forced to undergo an emergency "rework." OpenAI seized this opportunity to prepare to scoop up the bottom!

Deconstructing Codex Code: Sol, Terra, Luna Are Coming

"To be honest, OpenAI just quietly stuffed model names into dead code like nothing happened, as if we wouldn't notice," a netizen joked.

Since the limited release of GPT-5.6, geeks have been closely watching every frontend update from OpenAI.

Finally, in a recent merge of the Codex app, someone discovered traces of GPT-5.6.

Another netizen posted a short video. Although the backend interface currently has limitations preventing successful model invocation, the popup window in the frontend clearly shows the styles of the three models and the brand new "Speed Selector."

Also, the code vaguely shows the text "Sol Ultra." Industry insiders speculate that Sol Ultra will be the ace card directly competing with competitors' top-tier flagships, matching Fable 5 in performance but at a much more affordable price.

In addition to these three models, the code also reveals a key piece of information: the highly anticipated "real-time voice support" is still under development and likely won't go live directly next week.

Leaked Test Results Surface: GPT-5.6 vs Fable 5

Although most people haven't used it yet, a few players with internal test permissions have shared comparison evaluations of GPT-5.6 in real engineering environments.

The result is four words: dimensionality reduction strike.

Round One: The Ultimate Battle of Efficiency and Understanding

Overseas tech blogger Shivam shared his experience using GPT-5.6-terra and Fable 5 to solve the same complex technical prompt.

Fable-5 started under a 100% 5-hour session limit. This model kept "thinking" crazily in the background, burning through 21% of the quota limit, and finally responded with a bunch of cross-questions asking him to reconfirm the technical details to solve.

For the same task, GPT-5.6-terra consumed only 13% of the quota, with astonishing response speed.

It didn't waste words; instead, it directly and efficiently listed several different methods and architectural paths to solve the problem and quickly began execution.

Shivam bluntly said: When using Fable, all I could think about was whether it would suddenly downgrade to Opus 4.8; GPT-5.6-terra's decisiveness brought me extreme comfort.

Round Two: WebGL Frontend Hardcore Mini-Game "Blind Test"

Oracle Director Gilson Melo gave GPT-5.6 High and Fable 5 High a tough test:

In a single HTML file, build a fully functional browser-based game from scratch (using WebGL or HTML5 Canvas). The game must feature real-time rigid body physics, gravity, and user-controlled paddle/spaceship mechanics. Write complete CSS, JS, and HTML without omitting any logic. Must support mouse drag with real-time physical feedback.

This problem tests the model's ability to handle extreme details, long code without shrinking, and underlying physics formula calculations.

The two models showed different strategies in the workflow.

Fable 5 High performed impressively, confidently generating the entire game code in one go.

GPT-5.6 High paused twice very human-like during generation, actively asking the developer to clarify two final key decisions.

Even more impressive, without being asked, it took the liberty of adding sound effects to the game.

The final results showed that GPT-5.6 High achieved more solid scores in overall game experience, smoothness of physics collisions, and robustness of details.

In short, both testers believed that GPT-5.6 excels in efficiency and response style, especially in clarity and speed when handling complex tasks.

From this result, it is certainly worth looking forward to the launch of GPT-5.6 next week.

Precise Timing: OpenAI Strikes While the Iron Is Hot to Steal Users

If the model leak was an accident, the release time is definitely a well-thought-out strategy.

OpenAI plans to release GPT-5.6 on July 7, precisely the day when Claude users lose access to Fable 5.

Recently, Claude has lost quite a few users, and OpenAI seized the opportunity to take them all in.

An insider revealed: "The usage quota limits for GPT-5.6 will be significantly relaxed, more generous than Fable 5. Stricter safety guardrails are also gradually being rolled out, but they won't be as aggressive as Fable's, affecting normal use."

User dissatisfaction is high, and it's the right time for OpenAI to poach users

In contrast, Anthropic has been facing a lot of public resentment lately.

Although Claude Fable 5 has just returned, it has already sparked strong user dissatisfaction.

Ask a few casual questions, and Fable 5 downgrades to Opus 4.8.

Bioengineering physician Derya Unutmaz tried to get Fable 5 to explain the word "human."

Just typing "Explain human," after a few seconds of thinking, the model popped up a card saying "Switched to Opus 4.8" because Fable 5's safety mechanism determined the message contained content to intercept.

Even more absurdly, semiconductor analyst Dylan Patel asked an extremely simple question: "How many r's are in the word raspberry?"

This question was also intercepted, and the interface displayed "Chat paused," indicating that Fable 5's safety mechanism blocks most topics related to cybersecurity or biology.

Additionally, Opus 4.8 has recently had severe hallucination issues, even showing other people's information in its own conversations.

This cliff-like drop in user experience precisely creates the optimal window for OpenAI to steal users.

Moreover, GPT-5.6 is likely to have a cost advantage.

Leaks show that GPT-5.6 Sol will be more than twice as cheap as Fable 5 because of higher token efficiency. But the key is whether its performance can match Fable 5?

Some predict that Sol Ultra should be comparable to Fable 5 while being cheaper. If this prediction comes true, OpenAI will completely surpass its competitors in cost-performance ratio.

Developer Reminder: 4 Codex Reset Quotas, Don't Let Them Go to Waste

Finally, for all hardcore developers preparing to return to Codex, here is a "freebie/pitfall avoidance" guide.

According to in-depth research by Reflection CTO, if you previously accumulated 4 rate limit reset quotas in Codex, immediately check your account backend.

OpenAI's official underlying rules show that these reset quotas are only valid for 30 days. If your first quota was received around June 11 or 12, they will start expiring in batches around July 12!

If you want to know your exact expiration time, you can ask Codex to call your ChatGPT token to request this backend API: GET

You will receive a JSON response similar to the following:

If GPT-5.6 is indeed unbanned next Tuesday as scheduled, you will have only 4 to 5 days to use your first reset quota.

Next Tuesday, OpenAI will likely give everyone another brand new Reset. So, use your old quotas wisely on the most critical tasks in the coming days.

GPT-5.6, see you next week!