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GLM 5.3 FlashX vs Grok Build 0.1

GLM 5.3 FlashX costs 1.6x less per output token than Grok Build 0.1 ($1.25 vs $2.00 per million). Updated October 22, 2026; no benchmark has tested both models yet.

Replace GLM 5.3 FlashX Replace Grok Build 0.1
GLM 5.3 FlashXZ.ai
Coding
No data
Overall
No data
Output $/M
$1.25
Grok Build 0.1xAI
Coding
No data
Overall
No data
Output $/M
$2.00
vs $1.25 vs $2.00 per 1M output tokens. GLM 5.3 FlashX is 1.6x cheaper.

GLM 5.3 FlashX or Grok Build 0.1: which to pick

Neither model has a coding score yet, so the two cannot be ranked on coding.

Pick GLM 5.3 FlashX for output tokens 1.6x cheaper ($1.25 vs $2.00 per million) and a larger context window (1.05M against 256K tokens).

Model AGLM 5.3 FlashXZ.aiNot benchmarkedNo coding benchmarkNo cost per solved taskModel BGrok Build 0.1xAINot benchmarked1 independent benchmarkNo cost per solved task

No benchmark has tested both yet. GLM 5.3 FlashX has none yet; Grok Build 0.1 on AA Coding Index, Vibe Code Bench (Vals AI) and AA Intelligence Index. Compare them on price and context instead.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
GLM 5.3 FlashX not benchmarked, Grok Build 0.1 not benchmarked.
Widest category
None yet: no category has been tested on both models.
Widest single gap
None yet: no benchmark has tested both models.
Output price
GLM 5.3 FlashX $1.25 against Grok Build 0.1 $2.00 per million output tokens, 1.6x apart.
Context window
GLM 5.3 FlashX takes 1.05M tokens, Grok Build 0.1 256K.

Benchmark by benchmark

Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.

CodingDirectional onlySix of these boards feed the Vibe Coding Index2 boards measured
Coding benchmarks for GLM 5.3 FlashX and Grok Build 0.1
BenchmarkGLM 5.3 FlashXGrok Build 0.1Leader
AA Coding IndexNot measured51.5Only Grok Build 0.1 measured
Vibe Code Bench (Vals AI)Not measured13.4%Only Grok Build 0.1 measured
Neither model has a result on the other 37 boards here
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
Intelligence benchmarks for GLM 5.3 FlashX and Grok Build 0.1
BenchmarkGLM 5.3 FlashXGrok Build 0.1Leader
AA Intelligence IndexNot measured27.2Only Grok Build 0.1 measured
Neither model has a result on the other 1 board here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

GLM 5.3 FlashX$0.0010Fits in one request
Grok Build 0.1$0.0020Fits in one request

GLM 5.3 FlashX costs less

Repository review

50K input + 3K output tokens

GLM 5.3 FlashX$0.022Fits in one request
Grok Build 0.1$0.056Fits in one request

GLM 5.3 FlashX costs less

Agent loop

200K input + 10K output tokens

GLM 5.3 FlashX$0.086Fits in one request
Grok Build 0.1$0.220Fits in one request

GLM 5.3 FlashX costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of GLM 5.3 FlashX and Grok Build 0.1
SpecificationZ.ai GLM 5.3 FlashXSpaceXAI Grok Build 0.1
MakerZ.aixAI
WeightsNo public weights listedNo public weights listed
ReleasedSeptember 18, 2026May 20, 2026
Context window1.05M256K
Input $/Mtok$0.37$1.00
Output $/Mtok$1.25$2.00
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it01
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is GLM 5.3 FlashX better than Grok Build 0.1 for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick GLM 5.3 FlashX for output tokens 1.6x cheaper ($1.25 vs $2.00 per million) and a larger context window (1.05M against 256K tokens).

Which is cheaper, GLM 5.3 FlashX or Grok Build 0.1?

GLM 5.3 FlashX costs $0.37 per million input tokens and $1.25 per million output tokens; Grok Build 0.1 costs $1.00 and $2.00. Cost per solved task is known for neither of them.

Which has the bigger context window, GLM 5.3 FlashX or Grok Build 0.1?

GLM 5.3 FlashX, with 1.05M tokens against 256K.

Has any benchmark tested both GLM 5.3 FlashX and Grok Build 0.1?

No benchmark has tested both yet. GLM 5.3 FlashX has none yet; Grok Build 0.1 on AA Coding Index, Vibe Code Bench (Vals AI) and AA Intelligence Index. Compare them on price and context instead. Data as of October 22, 2026.

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