Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

GLM-5.3 vs ByteDance Seed: Seed 1.6 Flash benchmark

Name: GLM-5.3 vs ByteDance Seed: Seed 1.6 Flash AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares GLM-5.3 (Zhipu) and ByteDance Seed: Seed 1.6 Flash (bytedance-seed) using the latest snapshots we have as of Aug 17, 2026. ByteDance Seed: Seed 1.6 Flash wins on output price at $0.3/1M. ByteDance Seed: Seed 1.6 Flash has the larger context window (262k tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.

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Zhipu

GLM-5.3

Z.ai Aug 14 2026 post-train of the GLM-5.2 744B base. Coding-plan live; open weights promised after a two-week safety review (z.ai/blog/glm-5.3).

Elo 1,558$1.8/1M out

bytedance-seed

ByteDance Seed: Seed 1.6 Flash

Auto-discovered from OpenRouter (bytedance-seed/seed-1.6-flash). Preview until a second source matches.

$0.3/1M out

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Instant pairwise benchmark recalculation across 400+ LLMs

Model A

Model B

Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

GLM-5.3 (7)vsByteDance Seed: Seed 1.6 Flash (3)

GLM-5.3: 7W (70%)Overall: GLM-5.3ByteDance Seed: Seed 1.6 Flash: 3W (30%)

← GLM-5.3ByteDance Seed: Seed 1.6 Flash →

GLM-5.3 (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,558vs—

Coding Elo

1,586vs—

SWE-bench

76.4%vs—

LiveBench

70.8%vs—

GPQA Diamond

83.2%vs—

GLM-5.3: 5WByteDance Seed: Seed 1.6 Flash: 0W

GLM-5.3 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

90 tok/svs—

Time to first token

255 msvs—

GLM-5.3: 2WByteDance Seed: Seed 1.6 Flash: 0W

ByteDance Seed: Seed 1.6 Flash (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$1.8/1Mvs$0.3/1M

Input price

$0.5/1Mvs$0.075/1M

Context window

200kvs262k

GLM-5.3: 0WByteDance Seed: Seed 1.6 Flash: 3W

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect

Percentile 0–100

Dimensional AdvantageGLM-5.3 4/6

Preference Elo

No shared data

Throughput Speed

No shared data

Token Price Efficiency

ByteDance Seed: Seed 1.6 Flash

$1.50/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,558

EloHigh is better

—

Code Elo

High is better

1,586

Code EloHigh is better

—

LiveBench

High is better

70.8%

LiveBenchHigh is better

—

SWE-bench

High is better

76.4%

SWE-benchHigh is better

—

GPQA

High is better

83.2%

GPQAHigh is better

—

TTFT

Low is better

255 ms

TTFTLow is better

—

Speed

High is better

90 tok/s

SpeedHigh is better

—

In $

Low is better

$0.50 / 1M

In $Low is better

$0.08 / 1M+567%

Out $

Low is better

$1.80 / 1M

Out $Low is better

$0.30 / 1M+500%

Context

High is better

200k

ContextHigh is better

262k+31%

Interactive Simulator (USD)

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save up to 84% with ByteDance Seed: Seed 1.6 Flash

Monthly Volume50M tokens/mo

Quick Presets:

Token Ratio (In vs Out)70% In / 30% Out

RAG / Search (10% out)Coding / Chat (50% out)

GLM-5.3$44.50 / mo

In: $17.5Out: $27

ByteDance Seed: Seed 1.6 Flash$7.13 / mo

In: $2.63Out: $4.5

Estimated Cost Delta

ByteDance Seed: Seed 1.6 Flash is estimated to save $37.38/month ($449/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
ByteDance Seed: Seed 1.6 Flash:Pick ByteDance Seed: Seed 1.6 Flash when you are optimizing output cost.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatByteDance Seed: Seed 1.6 Flash

Lower output list price ($0.3/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGByteDance Seed: Seed 1.6 Flash

Larger window (262k).

Screenshots / visionGLM-5.3

GLM-5.3 is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	ByteDance Seed: Seed 1.6 Flash	Lower output list price ($0.3/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	ByteDance Seed: Seed 1.6 Flash	Larger window (262k).
Screenshots / vision	GLM-5.3	GLM-5.3 is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news

launchAug 14, 2026

GLM-5.3 (Aug 14): Z.ai post-train of the 5.2 744B base

Coding-plan live; open weights promised after a two-week safety review. Newest Zhipu row.

launchJun 18, 2026

GLM-5.2 remains the prior Zhipu flagship for upgrade pairs

Strong Chinese/English coding. 5.3 is the new row; 5.2 stays so the delta is visible.

Community Sentiment

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LIVE

Zhipu

GLM-5.3

Elo 1,558

LiveBench70.8%

SWE-bench76.4%

Speed90 tok/s

Output cost$1.8/1M

bytedance-seed

ByteDance Seed: Seed 1.6 Flash

Elo n/a

LiveBench—

SWE-bench—

Speed—

Output cost$0.3/1M

Frequently Asked Questions

Which is better overall, GLM-5.3 or ByteDance Seed: Seed 1.6 Flash?: We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, GLM-5.3 or ByteDance Seed: Seed 1.6 Flash?: SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?: ByteDance Seed: Seed 1.6 Flash output tokens are $0.3/1M versus $1.8/1M. Input prices and retry rates still move the real bill.
Which is faster, GLM-5.3 or ByteDance Seed: Seed 1.6 Flash?: We do not have TTFT for both models.
Which has the larger context window?: ByteDance Seed: Seed 1.6 Flash accepts 262k tokens versus 200k.
Can I self-host either model?: Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?: No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?: Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. GLM-5.3 and ByteDance Seed: Seed 1.6 Flash Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All GLM-5.3 matchups →|All ByteDance Seed: Seed 1.6 Flash matchups →

GLM-5.3 vs Z.ai: GLM 5V Turbo (previous glm)GLM-5.2 vs GLM-5.3 GPT-5 vs GLM-5.3 Claude Sonnet 5 vs GLM-5.3 Gemini 3 Pro vs GLM-5.3 Claude Opus 4.5 vs GLM-5.3

GLM-5.3 vs ByteDance Seed: Seed 1.6 Flash benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

GLM-5.3 (7)vsByteDance Seed: Seed 1.6 Flash (3)

GLM-5.3: 7W (70%)Overall: GLM-5.3ByteDance Seed: Seed 1.6 Flash: 3W (30%)

← GLM-5.3ByteDance Seed: Seed 1.6 Flash →

GLM-5.3 (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,558vs—

Coding Elo

1,586vs—

SWE-bench

76.4%vs—

LiveBench

70.8%vs—

GPQA Diamond

83.2%vs—

GLM-5.3: 5WByteDance Seed: Seed 1.6 Flash: 0W

GLM-5.3 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

90 tok/svs—

Time to first token

255 msvs—

GLM-5.3: 2WByteDance Seed: Seed 1.6 Flash: 0W

ByteDance Seed: Seed 1.6 Flash (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$1.8/1Mvs$0.3/1M

Input price

$0.5/1Mvs$0.075/1M

Context window

200kvs262k

GLM-5.3: 0WByteDance Seed: Seed 1.6 Flash: 3W

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatByteDance Seed: Seed 1.6 Flash

Lower output list price ($0.3/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGByteDance Seed: Seed 1.6 Flash

Larger window (262k).

Screenshots / visionGLM-5.3

GLM-5.3 is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	ByteDance Seed: Seed 1.6 Flash	Lower output list price ($0.3/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	ByteDance Seed: Seed 1.6 Flash	Larger window (262k).
Screenshots / vision	GLM-5.3	GLM-5.3 is the side marked multimodal in the catalog.

Frequently Asked Questions

Which is better overall, GLM-5.3 or ByteDance Seed: Seed 1.6 Flash?

We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.

Which is better at coding, GLM-5.3 or ByteDance Seed: Seed 1.6 Flash?

SWE-bench is missing for at least one model, so we do not rank coding from a single number.

Which is cheaper to run in production?

ByteDance Seed: Seed 1.6 Flash output tokens are $0.3/1M versus $1.8/1M. Input prices and retry rates still move the real bill.

Which is faster, GLM-5.3 or ByteDance Seed: Seed 1.6 Flash?

We do not have TTFT for both models.

Which has the larger context window?

ByteDance Seed: Seed 1.6 Flash accepts 262k tokens versus 200k.

Can I self-host either model?

Neither model is marked open-weights here. You are comparing hosted APIs.

Are these scores from CompareLLM’s own evals?

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

What does preference Elo mean on this page?

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. GLM-5.3 and ByteDance Seed: Seed 1.6 Flash Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

No shared data

No shared data

ByteDance Seed: Seed 1.6 Flash

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

GLM-5.3 (Aug 14): Z.ai post-train of the 5.2 744B base

GLM-5.2 remains the prior Zhipu flagship for upgrade pairs

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

GLM-5.3

ByteDance Seed: Seed 1.6 Flash

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

No shared data

No shared data

ByteDance Seed: Seed 1.6 Flash

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

GLM-5.3 (Aug 14): Z.ai post-train of the 5.2 744B base

GLM-5.2 remains the prior Zhipu flagship for upgrade pairs

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

GLM-5.3

ByteDance Seed: Seed 1.6 Flash

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons