Grok Build 0.1
xAI · released May 20, 2026
- Type
- Proprietary
- Input
- $1.00
- Output
- $2.00
- Cached
- $0.20
List price · per 1M tokens · xAI at 256K context · source ↗
Our take
Written Aug 3, 2026Grok Build 0.1 is a hosted-only text, image and file model from xAI with a 256,000-token request limit and a mid-tier coding and reasoning profile. Its mathematics score is the strongest in its benchmark set, though its agentic performance sits below median and appears to be slipping.
Pick this for long-context document analysis at 256,000 tokens when budget is tight, or for mathematics and reasoning workloads where its LiveBench scores are sufficient. Use the standard tier for basic coding assistance where speed matters — it is faster than the premium tier at half the price. Skip it if you need agentic coding or above-median agentic task performance.
The case for it
- Large request limit for its price class: 256,000 tokens on the cheapest tracked tier.
- Strong mathematics performance within its benchmark suite, at 78.43 — its highest sub-score.
- Fastest throughput on the cheapest tier: 121 tokens per second on the standard tier, versus 89.5 on the premium tier that costs twice as much.
The case against it
- Agentic performance is below median and slightly worsening: negative Arena Agent scores on consecutive measured dates, with a small decline between them.
- Agentic coding is a clear weak point, scoring 19.58 points below its own general coding result.
- Premium tier charges double for slower speed, making the cheaper standard tier the better value on both price and throughput.
How good is it?
IntelligencePuzzles, maths, exam questions
Grok Build 0.1 is not on Arena Text (overall), which is where the rating would come from, so there is no rating here. It is on LiveBench Data Analysis, in 22nd of 35 with 70.8.
CodingWriting and fixing code on its own
Grok Build 0.1 is not on Arena Coding, which is where the rating would come from, so there is no rating here. It is on LiveBench Coding, in 35th of 35 with 65.4.
AgenticPlanning, calling tools, staying on task
Arena Agent (IPS)31st of 36 · −0.08
WritingWe do not rate this
Two boards come close and neither tests writing: Arena Creative Writing asks people which of two replies they prefer, and LiveBench Language tests whether a model understood a passage. So we show where Grok Build 0.1 placed and give it no mark out of five.
These tests check whether a model follows instructions — a precondition for all the work above, but not a measure of how well that work is done, which is why they get no rating.
Every published score for this model9 scoresEvery figure we hold, from 9 boards, with who ran it and a link to the source — including the boards no rating above is built on.
Or rent it from someone else
Why this differs from the header. The strip above quotes xAI's own list price. This is the cheapest live offer at the widest standard context we hold, whoever is serving it — a reseller undercutting a lab is ordinary commerce, not an error.
- per 1M tokens
- $1.00 in / $2.00 out
- Context served
- 256K
- Throughput
- Not measured
| Provider | In / out per 1M tokens | Context | Throughput | Trains on prompts | Logs prompts | Zero retention |
|---|---|---|---|---|---|---|
| OpenRouter | $1.00 / $2.00 | 256K | not measured | Unknown | Unknown | Unknown |
| xAI | $1.00 / $2.00 | 256K | 119 tok/s | No | Yes30 days | Confirmed |
| xAIpriority tier | $2.00 / $4.00 | 256K | 90 tok/s | No | Yes30 days | Unknown |
xAIAcross the 3 listings we hold: 2 say they do not train on prompts, 0 say they do and 1 do not say. 1 appear in the zero-retention registry we check; the rest are unknown to us rather than confirmed either way.
What each host's API supports
From the parameter list each endpoint publishes. Streaming is omitted: nothing we hold reports it, for any model.
- ✓
- Supported
- ✗
- Not supported
- Not published
- host gave no parameter list
| Provider | Tool calling | JSON output | Strict schema |
|---|---|---|---|
| OpenRouter | ✓ | ✓ | ✓ |
| xAI | ✓ | ✓ | ✓ |
| xAIpriority | ✓ | ✓ | ✓ |
Tool calling: 3 of 3 listings say yes. JSON output: 3 of 3 listings say yes. Strict schema: 3 of 3 listings say yes.
When we formed this view
Dates behind this page
Prices last checked 9d ago
What we do not know about this model yet
- Nothing we hold says whether an endpoint streams, so we do not show it either way.
- 1 of 3 listings do not say whether they train on prompts.
Licence and identifiers
What the licence allowsWe hold no licence record for this model. Inside are the identifiers you need to pull it — its Hugging Face repo where we have one, our slug and a machine-readable card.
Licence
Commercial API terms. We hold no licence record for this model, so there is nothing to summarise here.
Identifiers
- Modality record
- text+image+file->text
- Catalogue slug
- x-ai-grok-build-0-1