Grok 4.8 Release Date: When Is It Coming Out?
When will Grok 4.8 launch? Follow Musk's 2.5T and C++ training timeline, public release and API status, and Grok access available now at up to ~94% off.
Published
Grok 4.8 has no confirmed public release date as of October 31, 2026. Musk has discussed a 2.5T model trained with a new C++ software stack, but the September training plan does not specify a public launch day. The xAI model catalog still lists Grok 4.7, the release notes contain no Grok 4.8 announcement, and the expected 4.8 news URL returns 404.
APIMaster has 0 public Grok 4.8 routes at this check. Once the public API opens, we will integrate it promptly and aim to offer the best pricing. For access now, compare Grok 4.7: 10 active public routes, from $0.1191 input / $0.3574 output per 1M tokens, up to ~94% off xAI's standard $2 / $6 price.
Prices below are USD per 1M input / output tokens, checked 2026-10-31. Each minimum is a paired quote from an active public route; the marketplace card governs current prices and availability.
| Model ID | Original price | APIMaster current price | Active routes | Discount | Model card |
|---|---|---|---|---|---|
grok-4.8 |
Not announced | No public route | 0 | — | Check status |
grok-4.7 |
$2 / $6 | From $0.1191 / $0.3574 | 10 | Up to ~94% off | Get Grok 4.7 |
grok-4.6 |
$2 / $6 | From $0.1191 / $0.3574 | 11 | Up to ~94% off | Compare routes |
grok-4.8 is an availability filter here, not a confirmed callable model ID. The discount belongs to the available models, not to a future Grok 4.8 offer.
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Grok 4.8 release timeline: what has actually happened?
| Date | Public information | What it tells us |
|---|---|---|
| September 14, 2026 | Musk described a 2.5T Grok 4.8 trained with a new C++ stack and said training would finish that week, followed by RL | A training plan; no public release date |
| September 14, 2026 | Musk said 4.8 would be a noticeable improvement and identified multimodal performance as an area to fix | The direction of expected improvement; no measured 4.8 result |
| September 21, 2026 | xAI released Grok 4.7 | An available baseline, not the Grok 4.8 launch |
| October 31, 2026 | Official catalog and release notes checked; no public 4.8 entry, news page 404, APIMaster public routes 0 | Public access remains unconfirmed at this check |
The two September statements are available in Musk's training post and capability outlook. His wording describes plans and expectations. It does not establish that training or RL subsequently finished on schedule.
Will Grok 4.8 launch in November 2026?
There is no official November launch commitment in the sources checked. “Late October” and “early November” are possible community predictions, not confirmed dates. Do not turn the end of one predicted window into a new promised deadline.
The useful signals are an announcement on xAI's own channels, a new entry in the release notes, and a model entry in the official catalog. An App rollout, invitation-only preview and public API opening can happen at different times. A date for one should not be used as the date for all three.
Why is Grok 4.8 taking longer than the September training plan?
The September post placed reinforcement learning after the planned training milestone. Post-training, evaluations and deployment are separate stages. That explains why “training finishes this week” is not equivalent to “available this week”; it does not establish the cause of any particular delay.
xAI has not published a detailed 4.8 rollout schedule in the checked sources. There is no basis here to claim failed training, a hardware problem, a safety hold, or a completed private deployment. Likewise, a 2.5T parameter count and C++ training stack do not establish inference speed, context size or price.
Is Grok 4.8 already available in the App, API or OpenRouter?
No public Grok 4.8 release was verified in this check. The official API catalog still identifies Grok 4.7, and APIMaster's 4.8 card has no public route. A third-party model-picker label, screenshot or anticipated grok-4.8 string is not by itself evidence of a working public model.
For OpenRouter, Cursor or another integration, inspect that product's current catalog and the actual request result separately. This article does not claim access in every private account. For endpoint and pricing details, see the existing Grok 4.8 API status guide; for model choices, read Grok 4.8 vs ChatGPT, Claude and Opus.
What will matter when Grok 4.8 is released?
A useful launch announcement should answer more than the date. Check the exact API model ID, eligible accounts, supported endpoints, context window, reasoning controls, tool and image support, token pricing and rate limits. Published benchmarks should specify the tested model, effort, tools and harness.
For a quick comparison after access opens, keep one real repository bug, one chart with a conflicting table, and one structured reasoning task ready. Run the same inputs on both models, count failed attempts and record the full bill. Our Grok 4.8 vs Grok 4.7 guide provides concrete test designs; it does not present unreleased 4.8 outputs as results.
Get Grok API access now
For a project starting today, open the Grok 4.7 model card, register, and create an API key. Use https://apimaster.ai/v1 with grok-4.7. This is a minimal request template for the released model:
curl "https://apimaster.ai/v1/chat/completions" \
-H "Authorization: Bearer $APIMASTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"grok-4.7","messages":[{"role":"user","content":"Review this API rollout plan and list the missing verification steps."}]}'
The checked 4.7 and 4.6 route ranges are $0.1191–$1.1212 input / $0.3574–$3.3636 output per 1M tokens. Cache, long-context, tools and retries can change the bill. Subscription access and API credit are separate purchases. Keep the model ID configurable so you can test 4.8 when it becomes available.
FAQ
What is the Grok 4.8 release date?
No official public date was confirmed as of 2026-10-31. November predictions remain predictions until xAI announces a date.
Has Elon Musk confirmed that Grok 4.8 training finished?
The cited September 14 post stated an intention to finish training that week and start RL. It is not a subsequent completion report.
Is Grok 4.8 the same as Grok 4.7?
No. Grok 4.7 is the released model with a documented ID and price. Grok 4.8 is the future version discussed in Musk's posts; its public access and final specifications remain unconfirmed here.
Can I download Grok 4.8 or join an official waitlist?
No official weights download or Grok 4.8 waitlist was verified in the sources checked. Use xAI's own channels to verify any claimed invitation.
Will APIMaster offer Grok 4.8?
We will integrate the public API promptly once it opens and aim to offer the best pricing. Today the 4.8 filter has 0 public routes; the available Grok 4.7 discount is not a promised 4.8 price.
Sources and latest check
Checked 2026-10-31: xAI models, release notes, Grok 4.7 announcement, 4.8 news URL, and the two September posts linked above. A missing announcement page alone is not the conclusion: the catalog, release notes and public route status were checked together.
Register → create a key → https://apimaster.ai/v1 → grok-4.7. Compare current Grok routes: up to ~94% off.