Which is cheaper, Qwen3.8 27B and GLM-5.3-Flash?

GLM-5.3-Flash has the lowest input price. Per 1M input tokens: Qwen3.8 27B from $0.40 and GLM-5.3-Flash from $0.07.

Which has the larger context window, Qwen3.8 27B and GLM-5.3-Flash?

GLM-5.3-Flash has the largest context window: Qwen3.8 27B 262,144 tokens and GLM-5.3-Flash 1,310,720 tokens.

Which is smarter, Qwen3.8 27B and GLM-5.3-Flash?

GLM-5.3-Flash scores highest on the Artificial Analysis Intelligence Index: Qwen3.8 27B 20.1 and GLM-5.3-Flash 27.8.

Can I switch between Qwen3.8 27B and GLM-5.3-Flash without changing my code?

Yes. All of them are served through FastRouter's OpenAI-compatible API, so switching is a change of the model parameter (qwen/qwen3.8-27b, z-ai/glm-5.3-flash).

Qwen3.8 27B vs GLM-5.3-Flash

Side-by-side pricing per provider, context window, benchmark scores and speed, all on one OpenAI-compatible API.

Estimate monthly cost for these models

Qwen3.8 27B Alibabaqwen/qwen3.8-27b

GLM-5.3-Flash Z.aiz-ai/glm-5.3-flash

Creator

Alibaba

Z.ai

Released

Aug 14, 2025

Aug 26, 2026

Context window

262K

1.31M

Max output

33K

131K

Input / 1MLowest provider price

$0.40

$0.07$0.07–$0.15 across 5

Output / 1MLowest provider price

$3.00

$0.25$0.25–$0.50 across 5

Providers

IntelligenceArtificial Analysis index

20.1

27.8

Accepts

Text, Image, Video

Produces

Text

Tool calling

Yes

Structured output

Yes

Reasoning

Yes

Qwen3.8 27B vs GLM-5.3-Flash: summary

Qwen3.8 27B and GLM-5.3-Flash are both available through FastRouter's OpenAI-compatible API, so switching between them is a change of model id, not a new integration.

Qwen3.8 27B, from Alibaba, has a 262,144-token context window, costs $0.40/1M input and $3.00/1M output tokens and scores 20.1 on the Artificial Analysis Intelligence Index.

GLM-5.3-Flash, from Z.ai, has a 1,310,720-token context window, costs from $0.07/1M input and $0.25/1M output tokens across 5 providers and scores 27.8 on the Artificial Analysis Intelligence Index.

GLM-5.3-Flash is the cheapest on input, 5.7× cheaper than the next model, GLM-5.3-Flash has the largest context window and GLM-5.3-Flash scores highest for intelligence.

Switch with one line

client = OpenAI(base_url="https://api.fastrouter.ai/api/v1", api_key="<FASTROUTER_API_KEY>") client.chat.completions.create(model="qwen/qwen3.8-27b", messages=[...]) # or client.chat.completions.create(model="z-ai/glm-5.3-flash", messages=[...])

Full API docs

Frequently asked questions

More comparisons

Benchmark scores sourced from ArtificialAnalysis