Qwen3.8 27B

qwen/qwen3.8-27b

qwen/qwen3.8-27b on Sylphx Models · 1.0M of context. One Responses contract, with list prices published per million tokens.

Released: Aug 14, 2026 · 37 days old
Provider: Alibaba (Qwen)
Context: 1,000,000 tokens

Open in the playground See a request sample Read the docs

Input $0.567 / MOutput $4.032 / MCached input $0.063 / MFull rate sheet

Context window1,000,000tokens per request

Max outputNot publishedtokens per response

Input$0.567 / Mper million tokens

Output$4.032 / Mper million tokens

Requests · 7d1metered on Responses

Avg TPM · 7d<1137 tokens

Pricing

USD per million tokens

Input: $0.567
Output: $4.032
Cached input: $0.063

$1.43 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 $1.433 per million at a 3:1 mix.

Chat replies · 3:1 input:output: $1.433 / M
Long documents · 9:1 input:output: $0.9135 / M
Heavy output · 1:1 input:output: $2.30 / M
Cache write: Not published
Currency and unit: USD / million tokens

Cached input reads cost 89% less than fresh input tokens.

Full rate sheet and billing rules.

Specification

Context window: 1,000,000 tokens
Max output: Not published
Input modalities: Not published
Output modalities: Not published
Family: 27B
Version: v3.8
Provider: Alibaba (Qwen)
Released: Aug 14, 2026 · 37 days old
Model id: qwen/qwen3.8-27b

Data posture

Consent-trained

The provider may train on data sent to this model, and Zero Data Retention is not available. Keep regulated or confidential material on a standard-posture model.

Training on what you send: Yes
Zero Data Retention: Not available

Traffic

Daily traffic the platform metered on Responses for this exact model id. Totals are the window they name; a day with no traffic is zero, not missing.

Requests · last 7 days: 1
Tokens · last 7 days: 137
Average TPM · last 7 days: <1
Series total · 14d: 3 req · 823 tok

14-day total 3 · peak 2 on Sep 10

Sep 6daily requests, oldest to newestSep 19

Daily numbers for the last 14 days

Daily requests and tokens metered for qwen/qwen3.8-27b
Day	Requests	Tokens
2026-09-06	0	0
2026-09-07	0	0
2026-09-08	0	0
2026-09-09	0	0
2026-09-10	2	686
2026-09-11	0	0
2026-09-12	0	0
2026-09-13	0	0
2026-09-14	0	0
2026-09-15	0	0
2026-09-16	0	0
2026-09-17	0	0
2026-09-18	0	0
2026-09-19	1	137

POST https://api.models.sylphx.ai/v1/responses

curl https://api.models.sylphx.ai/v1/responses \
  -H "Authorization: Bearer $SYLPHX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen/qwen3.8-27b",
    "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.

Quickstart Responses API Errors 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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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

1 requests metered on qwen/qwen3.8-27b over the last seven daysEvery Qwen model →