Z.ai: GLM 5.1

Released Apr 7, 2026

text→text

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Ranked in:Text WebDev

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OpenRouter

GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks. Unlike previous models built around minute-level interactions, GLM-5.1 can work independently and continuously on...

Best overall rank

#15

▼ 1 vs 7d ago

Total arena votes

218,112

Across 33 (subset, category) entries

Providers on OR

SiliconFlow + others

First seen

2026-05-08

72 days tracked

Trend

Pricing

Per token

Input (per 1M): $0.966
Output (per 1M): $3.04
Cache Read (per 1M): $0.179

Capabilities

Modality

text->text

Context

203K tokens

Tokenizer

Other

Max output

128K tokens

Moderation

Unmoderated

Hugging Face

zai-org/GLM-5.1

Supported parameters

frequency_penalty

include_reasoning

logit_bias

logprobs

max_tokens

min_p

presence_penalty

reasoning

repetition_penalty

response_format

seed

stop

structured_outputs

temperature

tool_choice

tools

top_k

top_logprobs

top_p

Providers

Provider	Region / Tag	Context	Input/M	Output/M	Uptime 1d	Latency	Quant	Cache
SiliconFlow	`siliconflow/fp8`	205K	$1.19	$3.74	99.95%	-	fp8	-
Z.AI	`z-ai/fp8`	203K	$1.40	$4.40	99.94%	-	fp8	-
StreamLake	`streamlake/fp8`	200K	$0.966	$3.04	99.93%	-	fp8	-
Baidu	`baidu/fp8`	203K	$0.980	$3.08	99.91%	-	fp8	-
DeepInfra	`deepinfra/fp4`	203K	$1.05	$3.50	99.90%	-	fp4	-
Wafer	`wafer/fp4`	203K	$1.00	$3.20	99.90%	-	fp4	-
Friendli	`friendli`	203K	$1.40	$4.40	99.88%	-	-	-
Parasail	`parasail/fp8`	203K	$1.40	$4.40	99.86%	-	fp8	-
AtlasCloud	`atlas-cloud/fp8`	203K	$1.26	$3.96	99.83%	-	fp8	-
Venice	`venice/fp8`	200K	$1.54	$4.84	99.64%	-	fp8	-
Fireworks	`fireworks`	203K	$1.40	$4.40	99.59%	-	-	-
GMICloud	`gmicloud/fp8`	203K	$0.980	$3.08	99.54%	-	fp8	-
Novita	`novita/fp8`	205K	$1.38	$4.40	98.94%	-	fp8	-
Nebius	`nebius/fp8`	203K	$1.40	$4.40	98.19%	-	fp8	-
BaseTen	`baseten/fp4`	203K	$1.30	$4.30	91.75%	-	fp4	-
Phala	`phala`	203K	$1.21	$4.20	89.35%	-	-	-
DigitalOcean	`digitalocean`	164K	$0.975	$4.30	84.01%	-	-	-
Chutes	`chutes/fp8`	203K	$0.980	$3.08	72.36%	-	fp8	-

Per-category ranks

Text

Rank	Category	Variant	Elo	Votes
#13	English	-	1486	13,537
#15	Math	-	1480	1,493
#16	Hard Prompts English	-	1503	9,285
#16	Industry Software And It Services	-	1512	11,462
#17	Coding	-	1521	8,056
#18	Multi Turn	-	1486	4,770
#19	Longer Query	-	1485	12,550
#21	Chinese	-	1520	1,658
#22	Creative Writing	-	1453	4,899
#22	Hard Prompts	-	1493	18,854
#22	Industry Entertainment And Sports And Media	-	1446	6,156
#22	Industry Life And Physical And Social Science	-	1490	4,740
#22	Industry Writing And Literature And Language	-	1459	7,124
#22	Instruction Following	-	1465	9,657
#23	Industry Medicine And Healthcare	-	1488	2,098
#24	Non English	-	1451	15,050
#25	Industry Mathematical	-	1482	1,554
#26	Expert	-	1499	2,754
#27	Exclude Ties	-	1478	21,636
#27	German	-	1466	423
#27	Japanese	-	1440	276
#27	Overall	-	1471	28,606
#28	Industry Legal And Government	-	1476	2,168
#29	French	-	1485	1,007
#29	Industry Business And Management And Financial Operations	-	1465	5,876
#30	Russian	-	1469	3,014
#35	Korean	-	1423	513
#35	Polish	-	1462	566
#37	Spanish	-	1457	1,004

WebDev

Rank	Category	Variant	Elo	Votes
#12	Webdev-html	-	1524	771
#15	Overall	-	1526	5,870
#15	Webdev	-	1526	5,870
#15	Webdev-react	-	1522	4,815