Balanced — strong quality at a mid priceOpen Weights

GLM 5.3 Prime Pricing

Z.ai · z-ai-glm-5-3-prime

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Input / 1M tokens

$2.80

Output / 1M tokens

$8.80

Context window

1M tokens

≈ 1,333 pages of text

Max output

131,072 tokens

What it costs in practice

Typical request (1,200 in + 400 out tokens)$0.0069

1,000 requests / month$6.88/mo 10,000 requests / month$68.80/mo 100,000 requests / month$688.00/mo

Estimate your own workloadOpens the calculator with GLM 5.3 Prime preloaded — adjust volume and token counts there.

Price history

Only one price point recorded so far.

The staircase chart appears once a price change is detected.

What it excels at

Handles extended context up to 1M tokens with 128k output, supporting long-document analysis and multi-turn generation.

The business tradeoff

Open-weights availability does not offset limited third-party ecosystem and potentially weaker English-language reasoning versus closed Western flagships.

Cheaper from Z.ai

GLM 5.3Z.ai$0.0021/ typical request GLM 5.3 FlashXZ.ai$0.0009/ typical request

Same tier from other providers

GPT-5.4 MiniOpenAI$0.0027/ typical request Claude Sonnet 4.6Anthropic$0.0096/ typical request Llama 4 MaverickMeta$0.0005/ typical request

Head-to-head

GLM 5.3 Prime vs GPT-5.4 Mini →GLM 5.3 Prime vs Claude Sonnet 4.6 →GLM 5.3 Prime vs Llama 4 Maverick →

Vendor list rates, as of Sep 23, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.