Sarvam AI
Z.ai

GLM 5.3

Work through complex code, large document sets and multi-step tasks with a million-token context window and adjustable reasoning effort.

  • Reasoning
  • Coding
  • Tool calling
  • Long context

Best suited for

  1. 01

    Repository-scale coding

    Keep implementation details, dependencies and test output in context while an agent investigates issues and prepares changes.

  2. 02

    Long-horizon tool use

    Combine reasoning with function calls to work through tasks that require several decisions and interactions with your systems.

  3. 03

    Complex document reasoning

    Bring instructions and source material into a large context window for synthesis, analysis and questions across documents.

Benchmarks

Artificial Analysis evaluates GLM 5.3 at max reasoning effort. Compare model quality with the named closed-model configurations below.

Artificial Analysis Intelligence Index

Index score
  • GLM 5.332
  • GPT-5.6 TerraNot scored

Build with the Sarvam SDK

pip install --upgrade sarvamaiV2 · Sarvam SDK · Streaming
import osfrom sarvamai import SarvamAI​client = SarvamAI(api_subscription_key=os.environ["SARVAM_API_KEY"])​stream = client.chat.completions_v2(    model="glm5.3",    messages=[{"role": "user", "content": "Explain why time to first token matters for a chat application briefly."}],    max_tokens=8000,    stream=True,)​for chunk in stream:    if not chunk.choices:        continue    text = chunk.choices[0].delta.content    if text:        print(text, end="", flush=True)
  1. 01 Install the Sarvam SDK

    Install sarvamai for Python or JavaScript. Store your key in SARVAM_API_KEY.

  2. 02 Choose your model

    Use model ID glm5.3. The SDK calls https://api.sarvam.ai/v2 for this example.

    V2 Chat Completions. Max reasoning is the default. Reasoning tokens count toward the 8,000-token output budget.

  3. 03 Validate your application

    Check output quality, supported parameters and tool behaviour on representative requests before moving production traffic.

Model API Reference

Frequently Asked
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