How much does GLM 5.3 Flash cost?

On the Respan gateway, input starts at $0.04 per 1M tokens on Relace, and output starts at $0.25 per 1M tokens on EmpirioLabs, after gateway discounts. Averaged across 17 providers, it costs $0.17 per 1M input tokens and $0.48 per 1M output tokens.

Which providers serve GLM 5.3 Flash on Respan?

17 providers serve GLM 5.3 Flash: Relace, EmpirioLabs, Inference.net, Novita, Baseten, DeepInfra, and 10 more. Fireworks, Perplexity, and TogetherAI require your own provider API key (BYOK).

What is GLM 5.3 Flash's context window?

GLM 5.3 Flash accepts up to 1.0M tokens of context on its largest provider route.

How do I use GLM 5.3 Flash with the Respan gateway?

Point any OpenAI-compatible SDK at https://api.respan.ai/api/ with your Respan API key and set the model to "zai/glm-5.3-flash". To set it up with a coding agent, copy the agent setup prompt at the top of this page.

How fast is GLM 5.3 Flash?

Over the last 30 days of requests through the Respan gateway, the fastest provider was Parasail at 304 tokens per second, and the lowest response latency was 0.2 seconds on Novita. Speed varies with request size and provider.

Where does GLM 5.3 Flash rank on the Respan Index?

GLM 5.3 Flash scores 40.4 out of 100 on the Respan Index v1.1, ranking #47 of 138 models. By category: Coding 31.2, Agents 61.7, Reasoning 23.6, Knowledge & language 29.5, and Human preference 55.6. The Respan Index combines independent and lab-reported benchmark results into one score, using benchmark data collected by llmmetric.com.

How does GLM 5.3 Flash score on benchmarks?

GLM 5.3 Flash has 37 published benchmark scores, including Terminal-Bench 2.1 84.3%, Toolathlon Verified 78.4%, and GPQA Diamond 90.2%. Each score links to where it was published; the data is collected by llmmetric.com.

GLM 5.3 Flash

GLM-5.3-Flash is a native multimodal model from Z.ai. It is suited for efficient coding and long-horizon agent tasks. Its hybrid sparse and linear attention architecture maintains accurate long-context behavior while...

Tool Use

# Paste into Claude Code, Cursor, or Codex

Help me set up the Respan gateway: fetch and follow https://respan.ai/docs/agent-setup.md. Use model "zai/glm-5.3-flash".

Context window: 1.0M tokens
Input from: $0.04/M
Output from: $0.25/M
Providers: 17
Released: Aug 26, 2026

Providers

17 providers serve this model through the Respan gateway, cheapest first. Copy a model ID to call that route directly.

Provider	Context	Input	Output
Relace`relace/z-ai/glm-5.3-flash`	1.0M	$0.04/M	$0.50/M
EmpirioLabs`empiriolabs/glm-5-3-flash`	1M	$0.07/M	$0.25/M
Inference.net`inference_net/glm-5.3-flash`	1.0M	$0.10/M	$0.45/M
NovitaSave 10%`novita/zai-org/glm-5.3-flash`	1.0M	$0.14/M	$0.45/M
Baseten`baseten/zai-org/GLM-5.3-Flash`	1.0M	$0.15/M	$0.50/M
DeepInfra`deepinfra/zai-org/GLM-5.3-Flash`	1.0M	$0.15/M	$0.50/M
FireworksBYOK only`fireworks_ai/glm-5p3-flash`	1.0M	$0.15/M	$0.50/M
FriendliAI`friendliai/zai-org/GLM-5.3-Flash`	1.0M	$0.15/M	$0.50/M
Nebius`nebius/zai-org/GLM-5.3-Flash`	1.0M	$0.15/M	$0.50/M
OpenRouter`openrouter/z-ai/glm-5.3-flash`	1.0M	$0.15/M	$0.50/M
Parasail`parasail/parasail-glm-53-flash`	1.0M	$0.15/M	$0.50/M
Parasail`parasail/zai-org/GLM-5.3-Flash`	1.0M	$0.15/M	$0.50/M
PerplexityBYOK only`perplexity/glm-5.3-flash`	1M	$0.15/M	$0.50/M
TogetherAIBYOK only`together_ai/zai-org/GLM-5.3-Flash`	1.0M	$0.15/M	$0.50/M
Z.ai`zai/glm-5.3-flash`	1M	$0.15/M	$0.50/M
Nextbit256`nextbit256/glm:5.3-flash`	1.0M	$0.17/M	$0.55/M
Wafer`wafer/GLM-5.3-Flash`	1.0M	$0.75/M	$0.50/M

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Pricing

Averaged across 17 providers, in USD per 1M tokens after gateway discounts.

Average input: $0.17/M
Average output: $0.48/M
Average cache read: $0.03/M
Average cache write: $0.00/M

Cost by volume

Total cost from 0 to 1T tokens on the cheapest and most expensive provider.

Highest$0.75/MWaferLowest$0.04/MRelace

Throughput and latency

30-day averages per provider from requests through the Respan gateway, best first. 11 of 17 providers had traffic in that window.

Output speed

Higher is better

304tokens/sbest, on Parasail

Parasail304 tok/s
Baseten222 tok/s
FriendliAI155 tok/s

Time to first token

Lower is better

1.1sbest, on Wafer

Wafer1.1 s
OpenRouter2.2 s
Parasail3.4 s

Response latency

Lower is better

0.2sbest, on Novita

Novita0.2 s
Parasail5.5 s
Baseten6.8 s

Benchmarks

37 published scores for GLM 5.3 Flash from 8 sources. Each score links to where it was published. Percentages are out of 100. Arena ratings are Elo, marked between the lowest and highest rated model on each leaderboard.