Flash — fastest and cheapest, lighter reasoningOpen Weights

GLM 5.3 Flash Pricing

Z.ai · z-ai-glm-5-3-flash

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Input / 1M tokens

$0.150

Output / 1M tokens

$0.500

Context window

1,310,720 tokens

≈ 1,748 pages of text

Max output

131,072 tokens

What it costs in practice

Typical request (1,200 in + 400 out tokens)$0.0004

1,000 requests / month$0.38/mo 10,000 requests / month$3.80/mo 100,000 requests / month$38.00/mo

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

Price history

List price per 1M tokens since we started tracking in Aug 2026. Each step marks a price change — hover a point for the exact date and rate.

What it excels at

Handles high-volume text and vision workloads with 1M-token context at low per-token cost; suitable for batch processing and retrieval-augmented tasks.

The business tradeoff

Open-weights deployment introduces hosting and latency variance; reasoning depth trails closed flagship models on complex multi-step problems.

Cheaper from Z.ai

GLM 5.3 Flash (batch)Z.ai$0.0002/ typical request

Same tier from other providers

GPT-5.4 NanoOpenAI$0.0007/ typical request Claude Haiku 4.5Anthropic$0.0032/ typical request Gemini 3.5 FlashGoogle$0.0054/ typical request

Head-to-head

GLM 5.3 Flash vs GPT-5.4 Nano →GLM 5.3 Flash vs Claude Haiku 4.5 →GLM 5.3 Flash vs Gemini 3.5 Flash →

Vendor list rates, as of Sep 10, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.