Grok Bot, Claude Opus 5.5 and the "Unsustainably High" Bill: What Is Confirmed

Musk says Grok Bot serving costs were unsustainable and usage limits were cut. What's confirmed about Claude Opus 5.5 routing, prices and the $8 plan.

T Terapep · Nov 4, 2026

TL;DR: On November 1, 2026, Elon Musk said on X that the cost of serving Grok Bot was "unsustainably high relative to revenue," after paying users complained that their weekly usage meters filled up far faster than expected (Business Insider via Yahoo Finance; Digital Today). A month earlier, on October 7, Musk had said Grok Bot would route tasks to "the best back-end model for any given task," naming Anthropic's Claude Opus 5.5 (Android Headlines). Opus 5.5 lists at twice Grok's input price and more than three times its output price, which helps explain the pressure. What is not confirmed: that every Grok Bot runs on Opus 5.5, by how much limits were cut, and whether Grok Bot is really in the $8 plan. The official FAQ says the $8 tier does not include it.

Timeline

Date (2026)	What happened	Source
August	SpaceX launches Grok Bot, an AI agent that runs tasks such as shopping on its own virtual computer	Business Insider / Yahoo
Sept 22	Anthropic launches Claude Opus 5.5 at $4 / $20 per million input/output tokens	Memeburn
Sept 28	Musk shares a film made with Opus 5.5 and writes that he "really felt the AGI"	Memeburn
Oct 7	Musk posts that Grok Bot will use the best back-end model per task, naming Claude Opus 5.5, Midjourney and Suno	Android Headlines; WikiTree
Oct 12	"The X Subscription" launches: Plus $8, Premium $30, Super $100, Ultra $200; Grok Bot included from Premium up	Business Today
Oct 20	On SpaceX's earnings call, Gwynne Shotwell cites 800,000 paid weekly Grok Bot users	Investing.com
Oct 31 – Nov 1 (Halloween weekend)	Users report weekly usage jumping from 50% to 100% with little or no use	Digital Today; AI Times
Nov 1	Musk: serving cost was "unsustainably high relative to revenue"; calls cutting allowances "just being sensible"	Business Insider / Yahoo
Nov 2	Anthropic's amended IPO prospectus shows about $17 billion in Q3 revenue	Investing.com

Confirmed / Reported / Unconfirmed

Confirmed (primary statement or official documentation)

Musk's cost statement. Several outlets reproduce the same X post: serving Grok Bot was "unsustainably high relative to revenue" (Digital Today, which embeds the post; Investing.com). In replies he asked whether the price of moving to a higher usage plan was too high, and he called the reduced allowances "just being sensible" (Business Insider / Yahoo).
Multi-model routing exists as policy. Musk's October 7 post said SpaceX would use "the best back-end model for any given task," including Claude Opus 5.5 (Android Headlines). The official Grok Bot FAQ says a task may run on a first-party model or on a third-party model from a listed sub-processor.
Users cannot see or pick the model. The FAQ says "Grok Bot does not show the underlying model for a request." It also says users "cannot be routed to or away from a particular model." Usage is logged as Grok Bot usage, not by model (Grok Bot FAQ).
Official per-token prices. Opus 5.5 costs $4 per million input tokens and $20 per million output tokens (Anthropic pricing). Grok 4.5 and Grok 4.7 both cost $2 input and $6 output for prompts under 200k tokens (xAI models and pricing).

Reported (credible outlets, not independently verifiable)

800,000 paid weekly users, cited on the October 20 earnings call (Investing.com; Business Insider / Yahoo).
Heavy reasoning and coding go to Opus 5.5, while Midjourney handles graphics and Suno handles music (Android Headlines). Musk's post did not say which tasks go to which provider (WikiTree).
Commercial terms are undisclosed. Anthropic rents compute at SpaceX's Colossus 1 under a deal announced in May. Neither company has disclosed what SpaceX pays for Opus 5.5 (Investing.com).
Size of the cut. Musk did not say how much limits were reduced or what the future criteria are (AI Times).

Unconfirmed or contradicted

"Every Grok Bot runs on Opus 5.5." This claim traces to a reply attributed to a Grok Bot team member (WikiTree; Wall Street CN). We could not locate the original post. The official FAQ describes per-task routing and mentions Opus 5.5 only as an example (Grok Bot FAQ).
"Free Opus 5.5 access." The claim comes from aggregator and repost articles. Even ProPakistani, which ran a "free" headline, says users still have to pay for Grok Bot. The claim that Musk is "subsidizing" the cost came from an unnamed commenter (Wall Street CN).
"Grok Bot is folded into the $8 plan." Business Insider and both Korean outlets report this (Business Insider / Yahoo; AI Times; Digital Today). The official FAQ, however, lists Grok Bot under Premium, Super and Ultra and says "Plus and Free don't" include it (Grok Bot FAQ). Launch coverage prices Plus at $8 and says Grok Bot starts at Premium ($30) (Business Today). Until SpaceX clarifies, treat "Grok Bot for $8" as unconfirmed.

Why it is expensive

Grok Bot is an agent, not a chatbot. One request can turn into many model calls: planning, browsing, writing code and retrying. Each call uses input tokens, the context sent in, and output tokens, the text generated. Output tokens cost more.

Official list prices, per million tokens (standard API, prompts under 200k tokens):

Model	Input	Output	Source
Claude Opus 5.5	$4.00	$20.00	Anthropic
Grok 4.5	$2.00	$6.00	xAI
Grok 4.7	$2.00	$6.00	xAI

Opus 5.5 is 2x Grok on input and about 3.3x on output at list price.

Illustration only. We don't know SpaceX's actual negotiated rates or Grok Bot's real token mix. Anthropic's pricing page uses an example coding session of 50,000 input tokens and 15,000 output tokens (Anthropic). At list prices, that session would cost:

Opus 5.5: (0.05 × $4) + (0.015 × $20) = $0.20 + $0.30 = $0.50
Grok 4.5: (0.05 × $2) + (0.015 × $6) = $0.10 + $0.09 = $0.19

At list price, the same work costs about 2.6x more on Opus 5.5. Multiply that across weekly usage by hundreds of thousands of paid users and flat monthly fees start to look thin. Caching and batch discounts exist on both sides, so real costs could be lower. This is arithmetic on list prices, not a reported figure.

Cysic CEO Leo Fan offered a broader view. Agents make unlimited usage "harder to sustain," he said, because longer tasks and retries can absorb any savings from cheaper inference (Investing.com). The Grok Bot FAQ adds that routing a task to Opus 5.5 does not change the user's per-token cost (Grok Bot FAQ). In other words, SpaceX absorbs the price difference rather than passing it to users.

What it means for Grok Bot users

Weekly limits are tighter. Limits reset weekly, and some users ran out with days left before reset (AI Times). No new numbers have been published.
Your usage is shared. On The X Subscription, Grok Bot "draws from the same weekly usage pool as Cursor and the Grok apps" (Grok Bot FAQ). Heavy Cursor or Grok chat use can therefore reduce what Grok Bot has left.
Check which tier you are on. According to the official FAQ, Premium, Super and Ultra include Grok Bot, and the $8 Plus tier does not. If you see "$8 Grok Bot" headlines, check your plan page before you downgrade.
Linked plans don't add together. If both SuperGrok and X Premium+ are linked, Grok Bot uses whichever grants more weekly usage (Grok Bot FAQ).
Settings to check (per the FAQ):
- Settings → Usage & Billing: current usage, the on-demand monthly limit, and Manage Plan.
- grok.com/dashboard: weekly usage on The X Subscription; extra credits live under /dashboard/billing.
- cursor.com/dashboard: spending limit for legacy Cursor accounts.
- On-demand off means the agent "stops when weekly usage runs out." A spending cap does not stop a Bot partway through a run.
You can't pick Opus. There is no model picker, so you cannot force cheaper or pricier routing.

FAQ

Does Grok Bot use Claude? Musk said on October 7 that Grok Bot would route tasks to the best model, including Claude Opus 5.5 (Android Headlines). The official FAQ confirms third-party routing but does not say which model handles which request. Claims that every Bot runs on Opus 5.5 are unconfirmed.

Why did Grok Bot cut usage limits? Musk said serving costs were "unsustainably high relative to revenue" (Business Insider / Yahoo). He did not give the size of the cut (AI Times).

Is Grok Bot free? There is a free trial: a usage credit with a 7-day window (Grok Bot FAQ). Ongoing access requires a paid plan. Reports of "free Opus 5.5" refer to Opus being bundled into paid Grok Bot plans, not to free use.

Is Grok Bot included in the $8 X subscription? Reports conflict. Business Insider says Grok Bot will be bundled into the $8 subscription. The official FAQ says the Plus tier does not include it, and launch coverage prices Plus at $8.

Can I see or choose which model my Grok Bot uses? No. The FAQ says there is no model picker and the underlying model is not shown.

Sources

Header image: AI-generated illustration, not a photo of the people, products or places named.

#grok bot#claude opus 5.5#elon musk#xai#anthropic#ai agents#usage limits#x subscription

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