GLM 5.3 Flash API model profile

Profile facts

Profile type

Kendr API model

Kendr API alias

kc-glm-5.3-flash

Model developer

Z.ai

Kendr route provider

Z.AI

Context window

1M

Snapshot date

2026-10-13

Knowledge cutoff

Not disclosed

Reference catalog ID

z-ai/glm-5.3-flash

When to pick GLM 5.3 Flash

GLM 5.3 Flash is worth reaching for when you need a route priced in the cheapest quarter of the catalog and scoring in the top quarter on the published intelligence index. The conditions below are the ones its own numbers support.

Each condition below is derived from this model's own values in the 2026-10-13 snapshot, compared only against models publishing the same field.

• Reach for it when cost is the binding constraint. At $0.026 in and $0.05 out per 1M tokens, combined token price sits in the cheapest quarter of the 149 models publishing both rates in this snapshot.
• Reach for it when answer quality matters more than unit cost. It scores 41.8 on the Artificial Analysis intelligence index, above three quarters of the 119 models carrying that field in the 2026-10-13 snapshot.
• Reach for it when the input includes images. The snapshot records image input, so screenshots, scans, and diagrams can be sent directly instead of described.
• Reach for it when the model has to call tools. Tool calling is recorded in the snapshot, so this route can drive an agent loop rather than only answer in prose.
• Look elsewhere when the request is trivial and latency-sensitive. Reasoning is mandatory on this route and cannot be turned off, so short factual requests still pay reasoning tokens and reasoning latency.

Context, modalities, and identity

GLM 5.3 Flash accepts text, image, and video and returns text. The snapshot records prompt caching, reasoning controls, structured output, text, text generation, tool calling, video input, vision, and web search as capabilities or interfaces.

Model developer

Z.ai

Kendr route provider

Z.AI

Context window

1M

Maximum output

943,718 tokens

Input modalities

text, image, and video

Output modalities

text

Knowledge cutoff

Not disclosed

Model overview

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 reducing compute overhead.

Reference model ID

z-ai/glm-5.3-flash

Canonical version

z-ai/glm-5.3-flash-20260826

Hugging Face ID

zai-org/GLM-5.3-Flash

Capabilities and supported controls

Capabilities and parameters are reported from the dated catalog and source records; their presence does not guarantee identical behavior across every provider route.

Supported parameters

frequency_penalty, include_reasoning, logit_bias, logprobs, max_tokens, min_p, parallel_tool_calls, presence_penalty, reasoning, reasoning_effort, repetition_penalty, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_k, top_logprobs, top_p

• prompt caching
• reasoning controls
• structured output
• text
• text generation
• tool calling
• video input
• vision
• web search

Dated pricing snapshot

The dated reference snapshot lists $0.0261 input and $0.05 output per million tokens. Cached input is $0.0087 per million tokens. The separately published provider-route reference is $0.07 / $0.25 ($0.02/M cached input).

Reference figures are dated 2026-10-13; the live Kendr quote can differ by selected provider route, context tier, caching, tools, region, and current rate card.

Price date

2026-10-13

Input

$0.0261 per 1M tokens

Cached input

$0.0087 per 1M tokens

Output

$0.05 per 1M tokens

Provider routes, performance, and uptime

The snapshot retains 32 provider endpoints. Provider prices, context limits, p50 performance, and uptime can differ by route and are not Kendr guarantees.

Active provider endpoints

29

Best p50 latency

0.31 s

Best p50 throughput

271 tok/s

Availability with routing

99.91% over the sampled window

Availability without routing

96.03% over the sampled window

Performance date

2026-10-13

Benchmark evidence and limitations

The 2026-10-13 snapshot includes 3 Artificial Analysis indexes, 8 Design Arena categories, and AutoExacto results for 40 provider observations. Publisher-reported launch results are labeled and are not presented as Kendr measurements; scores from different suites are not treated as interchangeable.

Third-party catalog fields normalized from the cited model dataset; benchmark methodology and coverage differ by source.

Intelligence Index

41.8

Coding Index

71.5

Agentic Index

50.9

AutoExacto coverage

40 provider observations over 32 days

AutoExacto provider benchmarks

Rolling provider observations from the cited third-party benchmark view. The lookback is 32 days; GPQA Diamond and TAU-Bench Airline measure different abilities and should not be blended into one score.

Popularity and market context

GLM 5.3 Flash ranked #2 in the cited trailing-7-day third-party catalog usage dataset as of 2026-10-13. Observed within the cited trailing-7-day third-party catalog usage dataset; this is not global AI market share.

Third-party catalog rank

#2

Global market share

Not inferred

Observation date

2026-10-13

OpenAI-compatible API example

This example applies to the published Kendr alias on this hosted profile. Check the live public catalog before use.

curl https://api.kendr.org/v1/chat/completions \
  -H "Authorization: Bearer $KENDR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"kc-glm-5.3-flash","messages":[{"role":"user","content":"Hello"}]}'

Frequently asked questions

Sources and evidence dates

1. GLM 5.3 Flash third-party catalog record (catalog, checked 2026-10-13)
2. Third-party model catalog methodology (methodology, checked 2026-10-13)
3. Z.ai official model documentation (primary, checked 2026-10-13)
4. Artificial Analysis capability indices methodology (benchmark, checked 2026-10-13)
5. Design Arena leaderboard and methodology (benchmark, checked 2026-10-13)
6. GLM 5.3 Flash third-party catalog record (benchmark, checked 2026-10-13)
7. GLM 5.3 Flash provider or route reference (primary, checked 2026-10-13)