GLM 5.3 Flash vs Qwen3.8 27B
API pricing, context window and capabilities for GLM 5.3 Flash and Qwen3.8 27B, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.
Verdict
computed from the published numbersGLM 5.3 Flash wins on Terminal-Bench, on intelligence and on context window.
Price
Tied
Terminal-Bench
GLM 5.3 Flash
Intelligence
GLM 5.3 Flash
Context window
GLM 5.3 Flash
Key takeaways
who wins on what, from the published numbersGLM 5.3 Flash wins
- Cheaper output ($0.35 vs $1.49 /1M)
- Larger context window (1M vs 262K)
- Higher max output (1M vs 33K)
- More serving providers (13 vs 7)
Qwen3.8 27B wins
- Cheaper input ($0.11 vs $0.04 /1M)
Cheaper overall
GLM 5.3 Flash
$0.11 + $0.35 /1M
Larger context
GLM 5.3 Flash
1M
More providers
GLM 5.3 Flash
13 providers
Pricing & specs
cheapest listed route · per 1M tokensOn-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower. An OpenRouter routed quote is the price of whichever upstream provider OpenRouter prefers today, so it moves day to day.
| GLM 5.3 Flash | Qwen3.8 27B | |
|---|---|---|
| Input $/1M | $0.11via Sail | $0.04OpenRouter routed quote best |
| Output $/1M | $0.35via Sail best | $1.49via Cerebras |
| Context window | 1M best | 262K |
| Max output | 1M best | 33K |
| Serving providers | 13 best | 7 |
| Date | Released Aug 26, 2026 | Released Aug 14, 2026 |
Benchmarks
Benchmark scores, side by side| GLM 5.3 Flash | Qwen3.8 27B | |
|---|---|---|
| Intelligence | 41.8 best | 33.7 |
| Terminal-Bench | 84% best | 80% |
| GPQA Diamond | 91% | 91% |
| Output speed | 67 t/s best | 45 t/s |
| Latency (TTFT) | 2.80s best | 3.83s |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
GLM 5.3 Flash
via Sail
$0.90
Qwen3.8 27B
via OpenRouter
$2.50
Capabilities
feature support, side by side| Feature | GLM 5.3 Flash | Qwen3.8 27B |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | — |
Related comparisons
Frequently asked questions
Which is cheaper, GLM 5.3 Flash or Qwen3.8 27B?
Qwen3.8 27B is cheaper for input ($0.11 vs $0.04 per 1M tokens) as an OpenRouter routed quote. GLM 5.3 Flash is cheaper for output ($0.35 vs $1.49 per 1M tokens) from Sail.
What is the context window difference between GLM 5.3 Flash and Qwen3.8 27B?
GLM 5.3 Flash has a 1M-token context window and Qwen3.8 27B has 262K tokens, so GLM 5.3 Flash can take a larger prompt.
How do GLM 5.3 Flash and Qwen3.8 27B compare on benchmarks?
On the tracked benchmarks, GLM 5.3 Flash leads on Terminal-Bench, and GLM 5.3 Flash leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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