ResearchLLM Verifications Leaderboard

Data as of · 78 models, 80 questions · reviewed by Suhas Bhairav · methodology

Head to head · tested 27 Oct 2026

Claude Haiku 5.5 vs GLM 5.3 Flash: accuracy, speed and price

Similar accuracy; GLM 5.3 Flash costs less per question.

AnthropicClaude Haiku 5.568.8% score · #26$0.00048 per question192 tok/sZ.aiGLM 5.3 Flash67.5% score · #28$0.00015 per question83 tok/s

Verdict

Built from the measurements below

  • Accuracy is too close to call: Claude Haiku 5.5 scored 68.8% and GLM 5.3 Flash 67.5% on the same 80 questions, a gap within what chance alone could produce.
  • GLM 5.3 Flash is 3.3× cheaper per question as billed ($0.00015 vs $0.00048), reasoning tokens included.
  • Claude Haiku 5.5 generates text 2.3× faster: 192 tokens per second against 83.
  • GLM 5.3 Flash starts answering sooner: 0.5 s to the first token, against 0.7 s for Claude Haiku 5.5.

Which should you choose?

Choose Claude Haiku 5.5 for faster streaming. Choose GLM 5.3 Flash for the lower cost per correct answer ($0.00022 against $0.0007), a quicker first token, shorter outputs (about 560 tokens per question against 873), open weights you can run yourself and more hosts to choose from on OpenRouter (34 against 5). The widest subject gap is in law: GLM 5.3 Flash answered 4 of 6 correctly, Claude Haiku 5.5 2 of 6. With so few questions per subject, treat this as a lead to test on your own prompts, not a result.

Accuracy gap +1.2 points (z = 0.17). A winner is called only when z is at least 1.96, the usual 95% threshold. Speed, latency and price need a 10% margin.

Head to head

Same questions, same prompt, same API

MeasureClaude Haiku 5.5GLM 5.3 FlashEdge
Verification scoreHigher is better68.8%67.5%Too close to call
Cost per questionLower is better$0.00048$0.00015GLM 5.3 Flash
Output speedHigher is better19283Claude Haiku 5.5
Time to first tokenLower is better0.7 s0.5 sGLM 5.3 Flash
End-to-end response timeLower is better3.9 s7.4 sClaude Haiku 5.5
Tokens per questionLower is better873560GLM 5.3 Flash
Context windowHigher is better1M1MSimilar

Side by side

Bars are scaled to the larger of the two values. The winner on each measure is marked in bold.

Every measure

Claude Haiku 5.5 first, GLM 5.3 Flash second

Verification scorehigher is better
Claude Haiku 5.568.8%
GLM 5.3 Flash67.5%
Cost per questionlower is better
Claude Haiku 5.5$0.00048
GLM 5.3 Flash$0.00015
Output speedhigher is better
Claude Haiku 5.5192
GLM 5.3 Flash83
Time to first tokenlower is better
Claude Haiku 5.50.7 s
GLM 5.3 Flash0.5 s
End-to-end response timelower is better
Claude Haiku 5.53.9 s
GLM 5.3 Flash7.4 s
Tokens per questionlower is better
Claude Haiku 5.5873
GLM 5.3 Flash560
Context windowhigher is better
Claude Haiku 5.51M
GLM 5.3 Flash1M

Score vs. cost per question

Both models in color, every other model in grey

Most attractive quadrant0255075100$0.00001$0.0001$0.001$0.01$0.10Cost per question (USD, log) →Verification score (%) →Qwen3.8 2.4T A95BCommand AReka Flash 3Gemma 4 26B A4BGemma 4 31BQwen3.5 397B A17BHermes 4 405BMuse WonderGrok 4.7o3gpt-oss-20bMinistral 3 3B 2512Nova Micro 1.0Phi 4Granite 4.2 8BHy3GLM 5.3 FlashSolar Pro 4Trinity Large ThinkingMiniMax M3Mistral Large 4Claude Opus 5.5GPT-6.1 SolGemini 4 ArgonGPT-5.4GPT-6 Lunagpt-oss-120bLlama 4 Maverick

Specifications and pricing

From OpenRouter's catalogue, plus the leaderboard's test dates

SpecificationClaude Haiku 5.5GLM 5.3 Flash
CreatorAnthropicZ.ai
Released7 Oct 202626 Aug 2026
Weights—Open weights
ReasoningYesYes
Inputtext, image, filetext, image, video
Outputtexttext
Context window1M tokens1M tokens
Knowledge cutoff——
List price in / out per 1M$0.1 / $0.5$0.15 / $0.5
Blended price per 1M (3:1)$0.20$0.24
Cheapest hostGoogle · $0.1 / $0.5Relace · $0.0379 / $0.074
Hosts on OpenRouter534
Last tested25 Oct 202626 Oct 2026

Compare any two models →

Claude Haiku 5.5 vs GLM 5.3 Flash: frequently asked questions

Is Claude Haiku 5.5 better than GLM 5.3 Flash?
On accuracy they are statistically tied: Claude Haiku 5.5 scored 68.8% and GLM 5.3 Flash 67.5% on the same 80 questions from open datasets. Similar accuracy; GLM 5.3 Flash costs less per question.
Which is cheaper, Claude Haiku 5.5 or GLM 5.3 Flash?
GLM 5.3 Flash is cheaper: $0.00015 per question as billed, against $0.00048. List prices: Claude Haiku 5.5 $0.1 in / $0.5 out, GLM 5.3 Flash $0.15 in / $0.5 out per million tokens.
Which is faster, Claude Haiku 5.5 or GLM 5.3 Flash?
Claude Haiku 5.5 is faster at 192 output tokens per second, against 83. Time to first token: 0.7 s for Claude Haiku 5.5, 0.5 s for GLM 5.3 Flash.
Which has the larger context window, Claude Haiku 5.5 or GLM 5.3 Flash?
Both accept about the same amount of context: 1M and 1M tokens.