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    GLM-5.3 Flash API pricing

    Z.ai model

    Short answer

    GLM-5.3 Flash by Z.ai costs $0.15 per 1M input tokens and $0.50 per 1M output tokens, with a 1M token context window. This is a temporary promotional rate. It scores 92% on SWE-bench Verified and 65.8% on ARC-AGI-2.

    Prices updated Oct 23, 2026 (APIpulse, CC BY 4.0) · Benchmarks: ARC Prize, Vals.ai · all models

    Input$0.15 / 1M
    Output$0.50 / 1M
    Context1M
    Blended (3:1)$0.24 / 1M

    Promotional rate: check the provider's site before relying on it.

    API cost calculator

    Enter your monthly usage in millions of tokens (1M tokens ≈ 750,000 words).

    GLM-5.3 Flash$2.50 / month$30 / year

    Standard rates; batch processing and prompt caching can lower the bill.

    Benchmarks

    ARC-AGI-2 (reasoning)65.8% (Max)
    SWE-bench Verified (coding)92%

    Other Z.ai models

    ModelInput / 1MOutput / 1M
    GLM-5.3 FlashX$0.37$1.25

    Frequently asked questions

    How much does the GLM-5.3 Flash API cost?

    GLM-5.3 Flash costs $0.15 per 1M input tokens and $0.50 per 1M output tokens (a temporary promotional rate). A workload of 10M input and 2M output tokens a month costs $2.50.

    What is the context window of GLM-5.3 Flash?

    GLM-5.3 Flash supports a 1M token context window.