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GLM-4.5 vs Grok 4

A complete head-to-head: pricing, context window, benchmarks, modality coverage, and openness, with a programmatic verdict synthesized from the underlying data.

Updated

GLM-4.5 specs · Grok 4 specs
Verdict by category
  • PriceGrok 4

    Grok 4 publishes pricing ($15.00 / 1M output tokens) while GLM-4.5 does not.

  • Context windowGrok 4

    Grok 4 accepts 256K tokens vs 128K, 2.0× the room for long documents and codebases.

  • BenchmarksTie

    No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores.

  • ModalitiesTie

    Both handle text, vision.

  • OpennessGLM-4.5

    GLM-4.5 ships open weights (MIT); Grok 4 is API-only.

On balance Grok 4 edges ahead, winning 2 of 5 categories against GLM-4.5's 1. Grok 4 publishes pricing ($15.00 / 1M output tokens) while GLM-4.5 does not. Grok 4 accepts 256K tokens vs 128K, 2.0× the room for long documents and codebases.

No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores. Both target the same set of modalities (text, vision), so the deciding factors are price, context, and raw quality. GLM-4.5 ships open weights (MIT); Grok 4 is API-only.

Both shipped within roughly a month of each other in 2025, so they share the same generation of training data and tooling. GLM-4.5 is usually picked for chinese llm and open source llm workloads, while Grok 4 sees more deployments in reasoning and research agent. If pricing matters more than every last benchmark point, run the numbers in the calculator below before committing.

Side-by-side specs

SpecGLM-4.5Grok 4
ProviderOtherxAI
ReleasedJul 2025Jul 2025
Modalitiestext, visiontext, vision
Context window128K tokens256K tokens
Max output,,
Input · 1MPricing not published$3.00 / 1M tokens
Output · 1MPricing not published$15.00 / 1M tokens
Knowledge cutoff,2024-11
Open weightsYes (MIT)No
API availableYesYes

Pricing at scale

What you'd actually pay at typical workloads. Numbers come from each model's published per-million-token rates.

  • Light usage, 100k in / 50k out per day, vs $31.50
  • Heavy usage, 1M in / 500k out per day, vs $315
  • RAG workload, 5M in / 200k out per day, vs $540

Light usage, 100k in / 50k out per day: pricing not directly comparable (one or both models are missing public per-token rates). Heavy usage, 1M in / 500k out per day: pricing not directly comparable (one or both models are missing public per-token rates). RAG workload, 5M in / 200k out per day: pricing not directly comparable (one or both models are missing public per-token rates).

Price calculator

Estimated spend for the listed models at your usage. Numbers are derived from each model's published per-million-token rates.

  • GLM-4.5Pricing unavailable
  • Grok 4$1.05

Benchmarks compared

Only sourced numbers. Where a benchmark is missing for one model we show the available value rather than fabricating the other.

GLM-4.5Grok 4
  • GPQA,87.5
Pick GLM-4.5 if

GLM-4.5 fits when…

  • MIT license
  • Strong Chinese
  • Multimodal
  • Self-hosting and on-prem requirements, open weights (MIT).
Pick Grok 4 if

Grok 4 fits when…

  • Real-time X data access
  • Strong on benchmarks at launch
  • Less restrictive content policy than peers
  • Long-context tasks, handles 256K tokens vs 128K for GLM-4.5.
Don't want either?

Consider DBRX

Databricks' 132B MoE, a notable 2024 open-weight release tuned for enterprise.

See DBRX specsGLM-4.5 vs DBRXGrok 4 vs DBRX

Frequently asked

  • Is GLM-4.5 or Grok 4 cheaper?
    Per-token pricing isn't published for at least one of these models, check each model's spec page for current rates.
  • Which has the larger context window?
    Grok 4 accepts 256K tokens vs 128K for GLM-4.5.
  • Is GLM-4.5 or Grok 4 better for coding?
    Both GLM-4.5 and Grok 4 are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.
  • Are either of these models open source?
    GLM-4.5 ships open weights (MIT). Grok 4 is API-only.
  • When were GLM-4.5 and Grok 4 released?
    GLM-4.5 was released by Other on 2025-07-28. Grok 4 was released by xAI on 2025-07-09.
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