Which is cheaper, GLM-4.5-Air or Grok-4.1 Fast Non-Reasoning?
As of August 25, 2026, Grok-4.1 Fast Non-Reasoning is 46% cheaper on blended LLM API pricing. Grok-4.1 Fast Non-Reasoning costs $0.20 per million input tokens and $0.50 per million output tokens ($0.70 blended 1M-in + 1M-out). GLM-4.5-Air costs $0.20 / $1.10 per million tokens ($1.30 blended). Sources: https://docs.z.ai/guides/overview/pricing and https://docs.x.ai/docs/models. The cheapest LLM for your app still depends on how many output tokens you generate.
How much does GLM-4.5-Air vs Grok-4.1 Fast Non-Reasoning cost per million tokens?
GLM-4.5-Air Z AI API pricing is $0.20 input and $1.10 output per million tokens via Z AI. Grok-4.1 Fast Non-Reasoning xAI API pricing is $0.20 input and $0.50 output per million tokens via xAI. Use those four numbers, not ChatGPT Plus or Claude Pro subscription prices, when you are comparing APIs.
Which is better for coding, GLM-4.5-Air or Grok-4.1 Fast Non-Reasoning?
GLM-4.5-Air has a published SWE-bench Verified score of 57.6%. Grok-4.1 Fast Non-Reasoning does not have that eval on this page yet.
What is the context window for GLM-4.5-Air vs Grok-4.1 Fast Non-Reasoning?
GLM-4.5-Air supports a 131K token context window, while Grok-4.1 Fast Non-Reasoning supports 2M tokens. Grok-4.1 Fast Non-Reasoning offers a larger context window. Filling a larger window bills more input tokens, so the cheaper-per-million model can still cost more on long documents.
Which model performs better on benchmarks, GLM-4.5-Air or Grok-4.1 Fast Non-Reasoning?
GLM-4.5-Air leads on 2 of 2 shared benchmarks versus Grok-4.1 Fast Non-Reasoning's 0 wins. Check the comparison table for GPQA Diamond, SWE-bench, MMLU, HLE, and the other evals we track. Token price and benchmark score together are the usual LLM comparison, not either number alone.
Is GLM-4.5-Air or Grok-4.1 Fast Non-Reasoning better for production use?
Both GLM-4.5-Air and Grok-4.1 Fast Non-Reasoning are production API models. For cost-sensitive production traffic, Grok-4.1 Fast Non-Reasoning has better economics on the blended 1M-in + 1M-out scale. For maximum capability, weight the benchmark table for your domain. Many production stacks route cheap models for drafts and a frontier model for the hard turn, which is usually cheaper than sending everything to the expensive API.
Can I switch between GLM-4.5-Air and Grok-4.1 Fast Non-Reasoning in my app?
Yes. Call GLM-4.5-Air through Z AI and Grok-4.1 Fast Non-Reasoning through xAI with separate API keys, or through a gateway that already wraps both. Keep prompts in tokens, not characters, when you estimate the invoice. AnotherWrapper templates can swap providers without rewriting auth and billing.
How accurate is this GLM-4.5-Air vs Grok-4.1 Fast Non-Reasoning pricing data?
List rates are the latest published Z AI API pricing and xAI API pricing, quoted per million tokens. Official rate sheets: https://docs.z.ai/guides/overview/pricing and https://docs.x.ai/docs/models. Prompt caching, batch APIs, and committed-use discounts can change the invoice. Benchmark scores are from official publications and independent evals, updated as new numbers land.
What is the output token limit for GLM-4.5-Air and Grok-4.1 Fast Non-Reasoning?
GLM-4.5-Air supports up to an unspecified number of output tokens per request, while Grok-4.1 Fast Non-Reasoning supports up to 30K output tokens. Output tokens are usually the expensive half of API pricing, so a higher max output cap is a capability, not a discount.
Which model has better throughput, GLM-4.5-Air or Grok-4.1 Fast Non-Reasoning?
Grok-4.1 Fast Non-Reasoning has a measured throughput of approximately 90 tokens/second. Throughput data for GLM-4.5-Air is not yet available. Throughput (tokens per second) and time-to-first-token are why two models with the same per-million-token price can still feel different in chat and agents.
How do I switch the models in this GLM-4.5-Air vs Grok-4.1 Fast Non-Reasoning comparison?
Use the model pickers at the top of this LLM comparison. Search any model in the index and the URL updates. Open GLM-4.5-Air or Grok-4.1 Fast Non-Reasoning from the sidebar for the single-model API pricing page, or go back to the LLM pricing table to sort by cheapest blended cost.
