SylphxModels

Z.ai

GLM Air family · v4.5

GLM-4.5-Air

Retiring in 25d
z-ai/glm-4.5-air

GLM-4.5-Air on Sylphx Models · 131K of context. One Responses contract, with list prices published per million tokens.

Released
Jul 28, 2025 · 424 days old
Retires
Oct 19, 2026 · 25 days left
Provider
z-ai
Context
131,072 tokens
Open in the playgroundSee a request sampleRead the docs
Input $0.2 / MOutput $1.10 / MCached input $0.03 / MFull rate sheet
Context window131,072tokens per request
Max output98,304tokens per response
Input$0.2 / Mper million tokens
Output$1.10 / Mper million tokens
Cached input$0.03 / M85% off input
ReleasedJul 28, 2025424 days old

Pricing

USD per million tokens
Input
$0.2
Output
$1.10
Cached input
$0.03

$0.42 for 750,000 input and 250,000 output tokens.

Assumption: one batch of 750,000 input plus 250,000 output tokens at the published list prices — recompute for your own mix. Blended $0.425 per million at a 3:1 mix.

Chat replies · 3:1 input:output
$0.425 / M
Long documents · 9:1 input:output
$0.29 / M
Heavy output · 1:1 input:output
$0.65 / M
Cache write
Not published
Currency and unit
USD / million tokens

Cached input reads cost 85% less than fresh input tokens.

Full rate sheet and billing rules.

Specification

Context window
131,072 tokens
Max output
98,304 tokens
Input modalities
Not published
Output modalities
Not published
Family
GLM Air
Version
v4.5
Provider
z-ai
Released
Jul 28, 2025 · 424 days old
Model id
z-ai/glm-4.5-air

Data posture

Standard

By default, prompts and outputs sent to this model are not used to train models.

Training on what you send · default
No
Zero Data Retention · default
Yes
curl https://api.sylphx.ai/v1/responses \
  -H "Authorization: Bearer $SYLPHX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "z-ai/glm-4.5-air",
    "input": "Summarise this incident report in three bullets.",
    "stream": false
  }'

How to call it

Send the official Responses document to the base URL above with your organization key and this exact model id. Streaming arrives as ordered events with one terminal event.

  • Retries: send an Idempotency-Key and a retry replays the original response instead of billing twice.
  • Errors: typed envelopes tell you whether to retry, wait, or fix the request.
  • Keys: mint and revoke organization keys from the console.
QuickstartResponses APIErrors and retries

Related models

Derived from this catalog: same provider first, then the same family, then the nearest neighbours by input price and context window.

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Similar price and context

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Independent evaluation

We do not publish benchmark scores for this model — we have not verified any. These external leaderboards run their own tests, so check them against your own workload.

Not our numbers
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