Flash — fastest and cheapest, lighter reasoningOpen Weights

GLM 5.3 FlashX Pricing

Z.ai · z-ai-glm-5-3-flashx

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Input / 1M tokens

$0.370

Output / 1M tokens

$1.25

Context window

1,048,576 tokens

≈ 1,398 pages of text

Max output

131,072 tokens

What it costs in practice

Typical request (1,200 in + 400 out tokens)$0.0009

1,000 requests / month$0.944/mo 10,000 requests / month$9.44/mo 100,000 requests / month$94.40/mo

Estimate your own workloadOpens the calculator with GLM 5.3 FlashX 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 1M-token contexts and vision inputs at low per-token cost; suitable for high-volume document and multimodal processing workloads.

The business tradeoff

Open-weights deployment introduces variable latency and quality depending on hardware; reasoning depth trails closed flagship models at similar price points.

Cheaper from Z.ai

GLM 4.6VZ.ai$0.0007/ typical request GLM 5.3 FlashZ.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 FlashX vs GPT-5.4 Nano →GLM 5.3 FlashX vs Claude Haiku 4.5 →GLM 5.3 FlashX vs Gemini 3.5 Flash →

Vendor list rates, as of Sep 19, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.