Head to head · OpenRouter

Tencent Hy4 vs Z.ai GLM 5.3 Flash

Both list a 1,048,576-token window and image input. Tencent Hy4 costs $0.417 in / $1.2505 out per million in this snapshot, while GLM 5.3 Flash lists $0.0052 / $0.1985 — far cheaper, but the catalogue has served several different GLM readings this month. Hy4 also reads images only; GLM lists image and video input.

Comparison Snapshot 2026-11-06 All models compared →

Quick verdict

Start with GLM 5.3 Flash when its current catalogue price holds and video input matters. Pay for Hy4 only after your own agent or document tests show a reason: its 65K output ceiling is lower, but its cache-read price is $0.021 per million and its single Tencent endpoint makes the serving path easier to account for.

Side-by-side comparison

Field	Tencent Hy4	Z.ai GLM 5.3 Flash
Provider	Tencent	Z.ai
Context window	1.05M tokens	1.05M tokens
Input / 1M	$0.417	$0.005
Output / 1M	$1.25	$0.199
Modalities	Text, Vision	Text, Vision, Video
Best for	Agents, Long Context, Multimodal	Budget, Long Context, Multimodal

Source openrouter.ai/api/v1/models Verified 2026-11-06

Cost estimates

Workload	Input	Output	Tencent Hy4	Z.ai GLM 5.3 Flash
Quick test	20,000	5,000	$0.015	$0.001
Product chat month	500,000	125,000	$0.365	$0.027
Document batch	5,000,000	1,000,000	$3.34	$0.225

Estimates use list input/output prices and exclude cache discounts, provider surcharges and tool fees.

Choose Tencent Hy4 if

✓ You have measured Hy4 beating GLM on your own long-context or tool-use cases
✓ You want one first-party Tencent endpoint rather than a volatile third-party price
✓ Your loop re-sends a large stable prefix and benefits from the $0.021 cache read

View Tencent Hy4 on OpenRouter ↗

Choose Z.ai GLM 5.3 Flash if

✓ You need video input, which Hy4 does not list
✓ You are optimising the token bill and GLM's current reading is the one you can actually buy
✓ Your output is longer than Hy4's 65,536-token ceiling allows

View Z.ai GLM 5.3 Flash on OpenRouter ↗

FAQ

Is Tencent Hy4 cheaper than Z.ai GLM 5.3 Flash?

Tencent Hy4 costs $0.417 input and $1.25 output per 1M tokens. Z.ai GLM 5.3 Flash costs $0.005 input and $0.199 output per 1M tokens.

Which model has the larger context window?

Tencent Hy4 offers 1.05M tokens; Z.ai GLM 5.3 Flash offers 1.05M tokens. Provider-specific limits can vary by route.

Which one should I choose?

Tencent Hy4 details Z.ai GLM 5.3 Flash details Estimate monthly cost

Pricing and context data are based on a 2026-11-06 snapshot. Provider limits and pricing can change; verify on OpenRouter before production.