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Claude Haiku 5.5 vs GLM-5.3 Flash
Of the 5 public leaderboards that rate both, Claude Haiku 5.5 scores higher on 4 and GLM-5.3 Flash on 1. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, Claude Haiku 5.5 is at 52 and GLM-5.3 Flash at 22.2 (out of 100). On each maker's API, Claude Haiku 5.5 costs $0.10 / $0.50 per 1M tokens (input / output) and GLM-5.3 Flash $0.15 / $0.50.
Scores as published by each board; table composed November 13, 2026.
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Leaderboard by leaderboard
| Board | Claude Haiku 5.5 | GLM-5.3 Flash | Higher |
|---|---|---|---|
| LMArena Elo (community votes) | 1,593.4 | 1,608.8 | GLM-5.3 Flash |
| LiveBench global average (0-100) | 68.9 | 60.7 | Claude Haiku 5.5 |
| Vals AI Vals Index accuracy % · weighted finance + coding tasks | 58.7 | 50.9 | Claude Haiku 5.5 |
| Artificial Analysis intelligence index · measured runs only | 36.5 | 27.8 | Claude Haiku 5.5 |
| Epoch AI Epoch Capabilities Index (ECI) · many benchmarks on one scale | 160.4 | 153.8 | Claude Haiku 5.5 |
Raw scores are each board's own scale, so compare within a row, not across rows. Full table: the bench index.
For coding
On the ArtificialWatch coding index, Claude Haiku 5.5 is at 59.3 (#18 of 48) and GLM-5.3 Flash at 37 (#29). Claude Haiku 5.5 scores higher on 2 of the 3 coding boards that rate both and GLM-5.3 Flash on 1.
| Coding board | Claude Haiku 5.5 | GLM-5.3 Flash |
|---|---|---|
| LMArena · Coding | 1,453.6 | 1,509.4 |
| LiveBench · Coding | 77.6 | 70.9 |
| Vals Vibe Code Bench | 90.4 | 30.8 |
Claude Haiku 5.5 at a glance
- Developer
- Anthropic
- Status
- Live since October 7, 2026
- API price
- $0.10 input / $0.50 output per 1M tokens · Anthropic, claude-haiku-5-5
- Context window
- 1M tokens
Live — Oct 7 · $0.10/$0.50 per MTok for prompts up to 100K tokens, $0.50/$2.50 above · cache reads $0.01 / $0.05 · 1M ctx / 128K out · knowledge cutoff Jun 2026 · in the API, the Claude apps, AWS, Google Cloud and Microsoft Foundry the same day · Anthropic's own table: OSWorld 2.1 72.4% (GPT-6 Luna 48.9%, Haiku 4.5 15.7%), Terminal-Bench 4.0 39.2% (Luna 16.4%) · Artificial Analysis Intelligence Index 43 at max effort, #2 of 179 in its price tier (read Oct 7) · our sweep fired on claude-haiku-5-5 at 17:52 UTC, OpenRouter listed it at 18:31.
Claude Haiku 5.5 is out at $0.10 / $0.50, a tenth of Haiku 4.5's price
2026-10-07 · Anthropic released Claude Haiku 5.5 on October 7 as claude-haiku-5-5, on the Claude API, Amazon Bedrock, Google Cloud, Microsoft Foundry and in the Claude apps.
GLM-5.3 Flash at a glance
- Developer
- Zhipu AI
- Status
- Live since August 26, 2026
- API price
- $0.15 input / $0.50 output per 1M tokens · Z.AI, glm-5.3-flash
- Context window
- 1M tokens
Live - $0.075/$0.25 per 1M · 1.31M ctx · open weights on HF Aug 25 · shipped first as the stealth id ox-alpha, which our sweep read FREE at ~1.05M ctx across three gateways Aug 20-21 · that Z.ai confirmed the stealth run was this model on Aug 26 is search-grade, not our own reading.
Claude Haiku 5.5 vs GLM-5.3 Flash: quick answers
Which is better, Claude Haiku 5.5 or GLM-5.3 Flash?
It depends on what you measure. Of the 5 public leaderboards that rate both, Claude Haiku 5.5 scores higher on 4 and GLM-5.3 Flash on 1. Claude Haiku 5.5's widest lead is on Epoch AI; GLM-5.3 Flash's widest lead is on LMArena. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, Claude Haiku 5.5 is at 52 and GLM-5.3 Flash at 22.2 (out of 100).
Which is newer, Claude Haiku 5.5 or GLM-5.3 Flash?
Claude Haiku 5.5. It went live on October 7, 2026, 42 days after GLM-5.3 Flash (August 26, 2026).
Which is cheaper, Claude Haiku 5.5 or GLM-5.3 Flash?
Claude Haiku 5.5 is cheaper on input; output costs the same. On each vendor's own API, Claude Haiku 5.5 is $0.10 input / $0.50 output per million tokens and GLM-5.3 Flash is $0.15 input / $0.50 output per million tokens. Claude Haiku 5.5's rate rises for prompts over 100K tokens. Prices as published in the models.dev catalog, as of 2026-11-12.
Which has the bigger context window, Claude Haiku 5.5 or GLM-5.3 Flash?
Neither. Both take 1M tokens.
How do Claude Haiku 5.5 and GLM-5.3 Flash compare for coding?
On the ArtificialWatch coding index, Claude Haiku 5.5 is at 59.3 (#18 of 48) and GLM-5.3 Flash at 37 (#29). Claude Haiku 5.5 scores higher on 2 of the 3 coding boards that rate both and GLM-5.3 Flash on 1.
Who makes Claude Haiku 5.5 and GLM-5.3 Flash?
Claude Haiku 5.5 is from Anthropic; GLM-5.3 Flash is from Zhipu AI.
Where do these numbers come from?
Each score is the leaderboard's own published figure, read by ArtificialWatch (table composed November 13, 2026). Boards measure different things, so raw scores are only comparable within a row.
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Also: the bench index · API pricing · what a workload costs on each · the wire