GLM 5.3 Flash vs Hy3 preview
API pricing, context window and capabilities for GLM 5.3 Flash and Hy3 preview, 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 price, on intelligence and on context window. Benchmark data is unavailable for one or both models.
Price
GLM 5.3 Flash
Terminal-Bench
Not called
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 input ($0.11 vs $0.18 /1M)
- Cheaper output ($0.35 vs $0.60 /1M)
- Larger context window (1M vs 262K)
- Higher max output (1M vs 236K)
- More serving providers (13 vs 1)
- Supports vision
- Supports structured output
Hy3 preview wins
No clear edge on the tracked metrics.
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 | Hy3 preview | |
|---|---|---|
| Input $/1M | $0.11via Sail best | $0.18OpenRouter routed quote |
| Output $/1M | $0.35via Sail best | $0.60OpenRouter routed quote |
| Context window | 1M best | 262K |
| Max output | 1M best | 236K |
| Serving providers | 13 best | 1 |
| Date | Released Aug 26, 2026 | Released Apr 20, 2026 |
Benchmarks
Benchmark scores, side by side| GLM 5.3 Flash | Hy3 preview | |
|---|---|---|
| Intelligence | 41.8 best | 22.7 |
| Terminal-Bench | 84% | Not available |
| GPQA Diamond | 91% best | 87% |
| Output speed | 67 t/s | Not available |
| Latency (TTFT) | 2.80s | Not available |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
GLM 5.3 Flash
via Sail
$0.90
Hy3 preview
via OpenRouter
$1.50
Capabilities
feature support, side by side| Feature | GLM 5.3 Flash | Hy3 preview |
|---|---|---|
| Vision | ✓ | — |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | — |
| Web search | — | — |
Related comparisons
Frequently asked questions
Which is cheaper, GLM 5.3 Flash or Hy3 preview?
GLM 5.3 Flash is cheaper for input ($0.11 vs $0.18 per 1M tokens) from Sail. GLM 5.3 Flash is cheaper for output ($0.35 vs $0.60 per 1M tokens) from Sail.
What is the context window difference between GLM 5.3 Flash and Hy3 preview?
GLM 5.3 Flash has a 1M-token context window and Hy3 preview has 262K tokens, so GLM 5.3 Flash can take a larger prompt.
How do GLM 5.3 Flash and Hy3 preview compare on benchmarks?
On the tracked benchmarks, GLM 5.3 Flash leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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