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 MiMo-V2.6-Pro: accuracy, speed and price

Similar accuracy; Claude Haiku 5.5 costs less per question.

AnthropicClaude Haiku 5.568.8% score · #26$0.00048 per question192 tok/sXiaomiMiMo-V2.6-Pro68.8% score · #26$0.002 per question58 tok/s

Verdict

Built from the measurements below

  • Accuracy is too close to call: Claude Haiku 5.5 scored 68.8% and MiMo-V2.6-Pro 68.8% on the same 80 questions, a gap within what chance alone could produce.
  • Claude Haiku 5.5 is 4.1× cheaper per question as billed ($0.00048 vs $0.002), reasoning tokens included.
  • Claude Haiku 5.5 generates text 3.3× faster: 192 tokens per second against 58.

Which should you choose?

Choose Claude Haiku 5.5 for the lower cost per correct answer ($0.0007 against $0.0029), faster streaming and shorter outputs (about 873 tokens per question against 2,157). Choose MiMo-V2.6-Pro for open weights you can run yourself.

Accuracy gap +0.0 points (z = 0.00). 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 5.5MiMo-V2.6-ProEdge
Verification scoreHigher is better68.8%68.8%Too close to call
Cost per questionLower is better$0.00048$0.002Claude Haiku 5.5
Output speedHigher is better19258Claude Haiku 5.5
Time to first tokenLower is better0.7 s0.7 sSimilar
End-to-end response timeLower is better3.9 s7.9 sClaude Haiku 5.5
Tokens per questionLower is better8732,157Claude Haiku 5.5
Context windowHigher is better1M1.1MSimilar

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, MiMo-V2.6-Pro second

Verification scorehigher is better
Claude Haiku 5.568.8%
MiMo-V2.6-Pro68.8%
Cost per questionlower is better
Claude Haiku 5.5$0.00048
MiMo-V2.6-Pro$0.002
Output speedhigher is better
Claude Haiku 5.5192
MiMo-V2.6-Pro58
Time to first tokenlower is better
Claude Haiku 5.50.7 s
MiMo-V2.6-Pro0.7 s
End-to-end response timelower is better
Claude Haiku 5.53.9 s
MiMo-V2.6-Pro7.9 s
Tokens per questionlower is better
Claude Haiku 5.5873
MiMo-V2.6-Pro2,157
Context windowhigher is better
Claude Haiku 5.51M
MiMo-V2.6-Pro1.1M

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 5.5MiMo-V2.6-Pro
CreatorAnthropicXiaomi
Released7 Oct 202621 Sept 2026
Weights—Open weights
ReasoningYesYes
Inputtext, image, filetext, image, video, audio
Outputtexttext
Context window1M tokens1.1M tokens
Knowledge cutoff——
List price in / out per 1M$0.1 / $0.5$0.435 / $0.87
Blended price per 1M (3:1)$0.20$0.54
Cheapest hostGoogle · $0.1 / $0.5GMICloud · $0.36975 / $0.7395
Hosts on OpenRouter55
Last tested25 Oct 202625 Oct 2026

Compare any two models →

Claude Haiku 5.5 vs MiMo-V2.6-Pro: frequently asked questions

Is Claude Haiku 5.5 better than MiMo-V2.6-Pro?
On accuracy they are statistically tied: Claude Haiku 5.5 scored 68.8% and MiMo-V2.6-Pro 68.8% on the same 80 questions from open datasets. Similar accuracy; Claude Haiku 5.5 costs less per question.
Which is cheaper, Claude Haiku 5.5 or MiMo-V2.6-Pro?
Claude Haiku 5.5 is cheaper: $0.00048 per question as billed, against $0.002. List prices: Claude Haiku 5.5 $0.1 in / $0.5 out, MiMo-V2.6-Pro $0.435 in / $0.87 out per million tokens.
Which is faster, Claude Haiku 5.5 or MiMo-V2.6-Pro?
Claude Haiku 5.5 is faster at 192 output tokens per second, against 58. Time to first token: 0.7 s for Claude Haiku 5.5, 0.7 s for MiMo-V2.6-Pro.
Which has the larger context window, Claude Haiku 5.5 or MiMo-V2.6-Pro?
Both accept about the same amount of context: 1M and 1.1M tokens.