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 DeepSeek V4 Flash Vision Exp: 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/sDeepSeekDeepSeek V4 Flash Vision Exp71.2% score · #24$0.0011 per question170 tok/s

Verdict

Built from the measurements below

  • Accuracy is too close to call: Claude Haiku 5.5 scored 68.8% and DeepSeek V4 Flash Vision Exp 71.2% on the same 80 questions, a gap within what chance alone could produce.
  • Claude Haiku 5.5 is 2.2× cheaper per question as billed ($0.00048 vs $0.0011), reasoning tokens included.
  • Claude Haiku 5.5 generates text 1.1× faster: 192 tokens per second against 170.

Which should you choose?

Choose Claude Haiku 5.5 for the lower cost per correct answer ($0.0007 against $0.0015), faster streaming and more hosts to choose from on OpenRouter (5 against 3). Choose DeepSeek V4 Flash Vision Exp for open weights you can run yourself.

Accuracy gap -2.5 points (z = -0.35). 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 5.5DeepSeek V4 Flash Vision ExpEdge
Verification scoreHigher is better68.8%71.2%Too close to call
Cost per questionLower is better$0.00048$0.0011Claude Haiku 5.5
Output speedHigher is better192170Claude Haiku 5.5
Time to first tokenLower is better0.7 s0.7 sSimilar
End-to-end response timeLower is better3.9 s3.2 sDeepSeek V4 Flash Vision Exp
Tokens per questionLower is better8731,301Claude Haiku 5.5
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, DeepSeek V4 Flash Vision Exp second

Verification scorehigher is better
Claude Haiku 5.568.8%
DeepSeek V4 Flash Vision Exp71.2%
Cost per questionlower is better
Claude Haiku 5.5$0.00048
DeepSeek V4 Flash Vision Exp$0.0011
Output speedhigher is better
Claude Haiku 5.5192
DeepSeek V4 Flash Vision Exp170
Time to first tokenlower is better
Claude Haiku 5.50.7 s
DeepSeek V4 Flash Vision Exp0.7 s
End-to-end response timelower is better
Claude Haiku 5.53.9 s
DeepSeek V4 Flash Vision Exp3.2 s
Tokens per questionlower is better
Claude Haiku 5.5873
DeepSeek V4 Flash Vision Exp1,301
Context windowhigher is better
Claude Haiku 5.51M
DeepSeek V4 Flash Vision Exp1M

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 5.5DeepSeek V4 Flash Vision Exp
CreatorAnthropicDeepSeek
Released7 Oct 202621 Aug 2026
Weights—Open weights
ReasoningYesYes
Inputtext, image, filetext, image
Outputtexttext
Context window1M tokens1M tokens
Knowledge cutoff——
List price in / out per 1M$0.1 / $0.5$0.2156 / $0.6468
Blended price per 1M (3:1)$0.20$0.32
Cheapest hostGoogle · $0.1 / $0.5DeepInfra · $0.2156 / $0.6468
Hosts on OpenRouter53
Last tested25 Oct 202626 Oct 2026

Compare any two models →

Claude Haiku 5.5 vs DeepSeek V4 Flash Vision Exp: frequently asked questions

Is Claude Haiku 5.5 better than DeepSeek V4 Flash Vision Exp?
On accuracy they are statistically tied: Claude Haiku 5.5 scored 68.8% and DeepSeek V4 Flash Vision Exp 71.2% 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 DeepSeek V4 Flash Vision Exp?
Claude Haiku 5.5 is cheaper: $0.00048 per question as billed, against $0.0011. List prices: Claude Haiku 5.5 $0.1 in / $0.5 out, DeepSeek V4 Flash Vision Exp $0.2156 in / $0.6468 out per million tokens.
Which is faster, Claude Haiku 5.5 or DeepSeek V4 Flash Vision Exp?
Claude Haiku 5.5 is faster at 192 output tokens per second, against 170. Time to first token: 0.7 s for Claude Haiku 5.5, 0.7 s for DeepSeek V4 Flash Vision Exp.
Which has the larger context window, Claude Haiku 5.5 or DeepSeek V4 Flash Vision Exp?
Both accept about the same amount of context: 1M and 1M tokens.