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AnthropicZ.aiLLM matchup
Claude Sonnet 5.5vs.GLM-5.3-Flash
Which one is better?
Claude Sonnet 5.5 performs better than GLM-5.3-Flash, but costs 13.3 times (input) and 20 times (output) as much.
Claude Sonnet 5.5
Rank 5
GLM-5.3-Flash
Rank 43
Claude Sonnet 5.5
GLM-5.3-Flash
Claude Sonnet 5.5
GLM-5.3-Flash
Claude Sonnet 5.5
Rank 21 of 478
GLM-5.3-Flash
Rank 7 of 478
Choose Claude Sonnet 5.5 for
No clear advantage for GLM-5.3-Flash.
Compare other versions
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On this page
Where is the difference?
Strengths at a glance
Sonnet 5.5GLM-5.3-FlashMedian of all ranked models
95 % range: Sonnet 5.5 119.5 to 130.9, GLM-5.3-Flash 91.3 to 102.6.
The same values and verdicts as the bars below. In the close-up the net starts at 80 points, just below the weaker model's lowest value; the reference group average is 100.
Sonnet 5.5 is ahead in 10 of 10 areas, GLM-5.3-Flash in none.
Sonnet 5.5 ahead: 10
Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.
Show 3 more areas that do not count toward the overall index
Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.
Claude Sonnet 5.5 vs. GLM-5.3-Flash at the same effort
Both models measured at the same reasoning efforts. This shows whether a lead comes from the model or only from more compute.
The gap compares only the Artificial Analysis test series in which both models are measured at that effort. Tied below 3 points, ahead only beyond two standard errors.
Which model for which task?
Everyday tasks, translated from the area values above. Each row names the values it rests on.
Claude Sonnet 5.5 vs. GLM-5.3-Flash in our own test
The same prompt for both models. We show the latest attempt without fixes; it does not count toward the overall index.
Claude Sonnet 5.5

Oct 1, 2026 · 28 s · $0.04
Test details
- Run date
- Oct 1, 2026
- API provider
- openrouter
- Requested API model
- anthropic/claude-sonnet-5.5
- Reasoning setting
- high
- Token limit including reasoning
- 8,192 tokens
- Output tokens
- 3,886 tokens
- Cost of the attempt
- $0.0389
- Response time
- 28.2 s
- API model reported in response
- anthropic/claude-sonnet-5.5
- Pinned endpoint
- Anthropic | anthropic/claude-sonnet-5.5-20260928
- Temperature
- Provider default
- Test protocol
- community-visual-tests-v1
- Technical checks
- Passed, not a quality rating
Visually reviewed. This individual test does not establish overall model quality.
GLM-5.3-Flash

Oct 1, 2026 · 50 s · $0.0013
Test details
- Run date
- Oct 1, 2026
- API provider
- openrouter
- Requested API model
- z-ai/glm-5.3-flash
- Reasoning setting
- high
- Token limit including reasoning
- 8,192 tokens
- Output tokens
- 2,563 tokens
- Cost of the attempt
- $0.0013
- Response time
- 49.7 s
- API model reported in response
- z-ai/glm-5.3-flash
- Pinned endpoint
- Z.AI | z-ai/glm-5.3-flash-20260826
- Temperature
- Provider default
- Test protocol
- community-visual-tests-v1
- Technical checks
- Passed, not a quality rating
Visually reviewed. This individual test does not establish overall model quality.
Earlier attempts (1)
- Sep 7, 2026API request failedReasoning setting: high
SVG short test
SVG short test
One SVG task with the same fixed settings for every model, without hidden thinking.
Prompt
Return only one standalone SVG of a pelican riding a bicycle. Use viewBox="0 0 800 600", simple shapes, two clearly visible wheels and a recognizable pelican with a long beak. At most 30 SVG elements and 1800 characters. No Markdown, explanations, comments, scripts, animation, CSS or external resources.
Claude Sonnet 5.5
Unavailable in this round
GLM-5.3-Flash
Unavailable in this round
Claude Sonnet 5.5 and GLM-5.3-Flash in the overall index
Every model with a place in the overall index, both models of this matchup highlighted. You can add or hide other models.
Overall index (Gradually Meta-Score v5)
20 of 95 models
Popularity compared
How often the models are searched for, used and mentioned, on a scale from 0 to 100.
GLM-5.3-Flash is more popular than Claude Sonnet 5.5: 85 to 79 out of 100.
Over time
Weekly values from October 18, 2026 to November 13, 2026
Claude Sonnet 5.5GLM-5.3-Flash
All data side by side
The better value is bold. For the overall index only when the gap is clear.
| Metric | Claude Sonnet 5.5 | GLM-5.3-Flash |
|---|---|---|
| Intelligence | ||
| Overall indexpoints, 100 = reference group average, higher is better | 121.9 | 94.3 |
| Rank | Rank 5 of 95 | Rank 43 of 95 |
| Price per 1M tokens | ||
| Inputwhat you send | $2 | $0.15 |
| Outputwhat the model writes | $10 | $0.50 |
| Cost per task (own tests)average of 3 original-protocol tasks both models passed (SVG short test not included) | $0.038 | $0.005 |
| Speed | ||
| Tokens per second | 103 | 101 |
| Popularity | ||
| Popularitysearch, usage and mentions, 0 to 100 | 79Rank 21 of 478 | 85Rank 7 of 478 |
| Technical | ||
| Context windowhow much text the model reads at once | 1 M tokens≈ 1,500 A4 pages | 1 M tokens≈ 1,500 A4 pages |
| Knowledge cutoff | June 2026 | n/a |
| Released | Sep 28, 2026 | Aug 26, 2026 |
| Availability | Active | Open Source |
| Open weights | no | yes |
Prices without caching or batch discounts · Page count as a rule of thumb from Artificial Analysis
Is there a better choice?
Overall index 110.5, rank 14$0.10 input and $0.50 output per 1M tokens
View profileOverall index 130.9, rank 1$8 input and $40 output per 1M tokens
Sonnet 5.5 vs. Claude Fable 5.2Shared benchmarks
Single results from the same benchmark version, task and metric. A value is bold only with the same test setup and a clear gap.
A: Claude Sonnet 5.5B: GLM-5.3-Flash
Show 54 more benchmarks
More comparisons
Compare Claude Sonnet 5.5 and GLM-5.3-Flash with the models people compare them with most often.
Compare another matchup
Predecessor and successor
The most popular comparisons
- 1Claude Sonnet 5.5 vs. Gemini 3.8 Flash
- 2Claude Sonnet 5.5 vs. DeepSeek-V4.1-Flash
- 3Claude Opus 5.5 vs. Claude Sonnet 5.5
- 4DeepSeek V4.1 Flash 1017 vs. GLM-5.3-Flash
- 5Claude Opus 5.5 vs. GLM-5.3-Flash
- 6GPT-6 Luna vs. GLM-5.3-Flash
- 7Claude Sonnet 5.5 vs. GLM-5.3
- 8Claude Sonnet 5.5 vs. Claude Haiku 5.5
- 9Claude Sonnet 5.5 vs. Claude Opus 5
Show all 81 comparisons
- 10Gemini 3.8 Flash vs. GLM-5.3-Flash
- 11Grok 4.7 vs. GLM-5.3-Flash
- 12Claude Sonnet 5.5 vs. Grok 4.7
- 13Claude Sonnet 5.5 vs. GPT-5.6 Terra
- 14Claude Haiku 5.5 vs. GLM-5.3-Flash
- 15GLM-5.3-Flash vs. GLM-5.3
- 16DeepSeek-V4.1-Flash vs. GLM-5.3-Flash
- 17DeepSeek-V4-Flash vs. GLM-5.3-Flash
- 18Claude Sonnet 5.5 vs. Claude Fable 5.1
- 19Claude Opus 5 vs. GLM-5.3-Flash
- 20Claude Sonnet 5.5 vs. Gemini 3.1 Pro Preview
- 21Claude Sonnet 5.5 vs. DeepSeek V4.1 Flash 1017
- 22Claude Sonnet 5.5 vs. GPT-6 Luna
- 23Claude Sonnet 5.5 vs. Kimi K3
- 24Claude Sonnet 5.5 vs. Qwen 3.8 27B
- 25Claude Sonnet 5.5 vs. Claude Opus 4.6
- 26Claude Sonnet 5.5 vs. DeepSeek-V4-Pro
- 27Claude Sonnet 5.5 vs. GPT-5.6 Luna
- 28GPT-5.6 Sol vs. GLM-5.3-Flash
- 29Claude Sonnet 4.6 vs. GLM-5.3-Flash
- 30GPT-6 Sol vs. GLM-5.3-Flash
- 31GPT-6 Astra vs. GLM-5.3-Flash
- 32Claude Sonnet 5.5 vs. GLM-5.2
- 33GLM-5.3-Flash vs. Qwen 3.8 27B
- 34Claude Sonnet 5.5 vs. DeepSeek-V4-Flash
- 35GPT-5.4 vs. GLM-5.3-Flash
- 36Claude Sonnet 5.5 vs. GPT-6 Sol
- 37Claude Sonnet 5.5 vs. Gemini 3.5 Flash-Lite
- 38Claude Sonnet 5.5 vs. Claude Fable 5
- 39Claude Sonnet 5.5 vs. Qwen 3.8 Max 0902
- 40GLM-5.3-Flash vs. Mistral Large 4
- 41Claude Sonnet 5.5 vs. Gemini 3.6 Flash
- 42Claude Sonnet 5.5 vs. Claude Sonnet 4.6
- 43Kimi K3 vs. GLM-5.3-Flash
- 44Claude Opus 4.6 vs. GLM-5.3-Flash
- 45Claude Sonnet 5.5 vs. GPT-5.6 Sol
- 46Claude Opus 4.8 vs. GLM-5.3-Flash
- 47Claude Sonnet 5.5 vs. Muse Spark 1.3
- 48Claude Sonnet 5.5 vs. Claude Opus 4.7
- 49DeepSeek-V4-Pro vs. GLM-5.3-Flash
- 50GLM-5.3-Flash vs. GLM-5.2
- 51GPT-5.6 Luna vs. GLM-5.3-Flash
- 52Claude Haiku 4.5 vs. GLM-5.3-Flash
- 53Claude Sonnet 5.5 vs. GPT-6 Astra
- 54Claude Sonnet 5.5 vs. Claude Opus 4.8
- 55Claude Sonnet 5.5 vs. Kimi K2.6
- 56Claude Fable 5.1 vs. GLM-5.3-Flash
- 57GLM-5.3-Flash vs. MiMo-V2.5-Pro
- 58Claude Sonnet 5.5 vs. Grok 4.6
- 59Claude Sonnet 5.5 vs. GPT-6.1 Sol
- 60Claude Sonnet 5.5 vs. Claude Sonnet 4.5
- 61Claude Sonnet 5.5 vs. Gemini 3.7 Flash
- 62Claude Sonnet 5.5 vs. Claude Haiku 4.5
- 63Claude Sonnet 5.5 vs. Mistral Large 4
- 64Claude Sonnet 5.5 vs. Mistral Medium 3.5
- 65Gemini 3.6 Flash vs. GLM-5.3-Flash
- 66GPT-6.1 Sol vs. GLM-5.3-Flash
- 67Claude Sonnet 5.5 vs. GPT-5.4
- 68Claude Sonnet 5.5 vs. Gemini 3.5 Flash
- 69Claude Sonnet 5.5 vs. GPT-5.5
- 70GPT-5.5 vs. GLM-5.3-Flash
- 71Claude Sonnet 5.5 vs. Claude Opus 4.5
- 72Grok 4.3 vs. GLM-5.3-Flash
- 73Claude Sonnet 5.5 vs. Kimi K3.1 Pro
- 74Kimi K3.1 Pro vs. GLM-5.3-Flash
- 75Claude Sonnet 5.5 vs. GPT-6.1 Terra
- 76Claude Sonnet 5.5 vs. Muse Wonder Full
- 77GPT-6.1 Terra vs. GLM-5.3-Flash
- 78Claude Sonnet 5.5 vs. Gemini 4 Argon
- 79Gemini 4 Argon vs. GLM-5.3-Flash
- 80Claude Sonnet 5.5 vs. Gemini 4 Carbon
- 81Muse Wonder Full vs. GLM-5.3-Flash