ResearchLLM Verifications Leaderboard

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

Head to head · tested 27 Oct 2026

Gemini 3.1 Pro Preview vs Gemini 4 Argon: accuracy, speed and price

Similar accuracy; Gemini 4 Argon costs less per question.

GoogleGemini 3.1 Pro Preview77.5% score · #9$0.017 per question124 tok/sGoogleGemini 4 Argon83.8% score · #2$0.0062 per question69 tok/s

Verdict

Built from the measurements below

  • Accuracy is too close to call: Gemini 3.1 Pro Preview scored 77.5% and Gemini 4 Argon 83.8% on the same 80 questions, a gap within what chance alone could produce.
  • Gemini 4 Argon is 2.8× cheaper per question as billed ($0.0062 vs $0.017), reasoning tokens included.
  • Gemini 3.1 Pro Preview generates text 1.8× faster: 124 tokens per second against 69.

Which should you choose?

Choose Gemini 3.1 Pro Preview for faster streaming. Choose Gemini 4 Argon for the lower cost per correct answer ($0.0074 against $0.022) and shorter outputs (about 558 tokens per question against 1,382). The widest subject gap is in law: Gemini 4 Argon answered 6 of 6 correctly, Gemini 3.1 Pro Preview 3 of 6. With so few questions per subject, treat this as a lead to test on your own prompts, not a result.

Accuracy gap -6.3 points (z = -1.00). 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

MeasureGemini 3.1 Pro PreviewGemini 4 ArgonEdge
Verification scoreHigher is better77.5%83.8%Too close to call
Cost per questionLower is better$0.017$0.0062Gemini 4 Argon
Output speedHigher is better12469Gemini 3.1 Pro Preview
Time to first tokenLower is better3.4 s3.3 sSimilar
End-to-end response timeLower is better8.9 s9.9 sGemini 3.1 Pro Preview
Tokens per questionLower is better1,382558Gemini 4 Argon
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

Gemini 3.1 Pro Preview first, Gemini 4 Argon second

Verification scorehigher is better
Gemini 3.1 Pro Preview77.5%
Gemini 4 Argon83.8%
Cost per questionlower is better
Gemini 3.1 Pro Preview$0.017
Gemini 4 Argon$0.0062
Output speedhigher is better
Gemini 3.1 Pro Preview124
Gemini 4 Argon69
Time to first tokenlower is better
Gemini 3.1 Pro Preview3.4 s
Gemini 4 Argon3.3 s
End-to-end response timelower is better
Gemini 3.1 Pro Preview8.9 s
Gemini 4 Argon9.9 s
Tokens per questionlower is better
Gemini 3.1 Pro Preview1,382
Gemini 4 Argon558
Context windowhigher is better
Gemini 3.1 Pro Preview1M
Gemini 4 Argon1M

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

SpecificationGemini 3.1 Pro PreviewGemini 4 Argon
CreatorGoogleGoogle
Released19 Feb 202613 Oct 2026
Weights——
ReasoningYesYes
Inputaudio, file, image, text, videoaudio, file, image, text, video
Outputtexttext
Context window1M tokens1M tokens
Knowledge cutoff——
List price in / out per 1M$2 / $12$2 / $10
Blended price per 1M (3:1)$4.50$4.00
Cheapest hostGoogle · $1 / $6Google AI Studio · $1 / $5
Hosts on OpenRouter22
Last tested26 Oct 202625 Oct 2026

Compare any two models →

Gemini 3.1 Pro Preview vs Gemini 4 Argon: frequently asked questions

Is Gemini 3.1 Pro Preview better than Gemini 4 Argon?
On accuracy they are statistically tied: Gemini 3.1 Pro Preview scored 77.5% and Gemini 4 Argon 83.8% on the same 80 questions from open datasets. Similar accuracy; Gemini 4 Argon costs less per question.
Which is cheaper, Gemini 3.1 Pro Preview or Gemini 4 Argon?
Gemini 4 Argon is cheaper: $0.0062 per question as billed, against $0.017. List prices: Gemini 3.1 Pro Preview $2 in / $12 out, Gemini 4 Argon $2 in / $10 out per million tokens.
Which is faster, Gemini 3.1 Pro Preview or Gemini 4 Argon?
Gemini 3.1 Pro Preview is faster at 124 output tokens per second, against 69. Time to first token: 3.4 s for Gemini 3.1 Pro Preview, 3.3 s for Gemini 4 Argon.
Which has the larger context window, Gemini 3.1 Pro Preview or Gemini 4 Argon?
Both accept about the same amount of context: 1M and 1M tokens.