Gemini 3.1 Pro vs Llama 3.1 Instruct 405B
Wins 6 of 6 areas
Coding · Agents · Reasoning · Facts · Long documents · Following instructions
Wins 0 of 6 areas
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Gemini 3.1 Pro is the stronger all-rounder.
Scores updated · 23 tests both models report · How we compare
Where each one wins
Tests won in each of the six areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- CodingWriting and fixing software40Gemini 3.1 Pro4 of 4 tests
- ReasoningHard problems that need careful thinking40Gemini 3.1 Pro4 of 4 tests
- FactsGetting facts right instead of making them up20Gemini 3.1 Pro2 of 2 tests
- AgentsCarrying out multi-step tasks on its own10Gemini 3.1 Pro1 of 1 test
- Long documentsFinding answers in very long texts10Gemini 3.1 Pro1 of 1 test
- Following instructionsDoing exactly what it is asked10Gemini 3.1 Pro1 of 1 test
Agents, long documents and following instructions rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Gemini 3.1 Pro pulls ahead
- Reasons across sets of long documentsAA-LCR+56.7points ahead
- Common-sense trick questionsSimpleBench+56.6points ahead
- Fixes real GitHub issues in Python projectsSWE-bench Verified+56.1points ahead
Where Llama 3.1 Instruct 405B pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 23 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGemini 3.1 Pro
- SWE-bench VerifiedGemini 3.1 Pro by 56.180.624.5+56.1
- Terminal-Bench HardGemini 3.1 Pro by 4753.86.8+47
- SWE-bench ProGemini 3.1 Pro by 4354.211.2+43
- SciCodeGemini 3.1 Pro by 28.858.729.9+28.8
ReasoningGemini 3.1 Pro
- SimpleBenchGemini 3.1 Pro by 56.679.623+56.6
- Humanity's Last ExamGemini 3.1 Pro by 43474+43
- GPQA DiamondGemini 3.1 Pro by 42.694.151.5+42.6
- CritPtGemini 3.1 Pro by 17.717.70+17.7
FactsGemini 3.1 Pro
- AA-Omniscience · AccuracyGemini 3.1 Pro by 31.754.923.2+31.7
- AA-Omniscience · Non-hallucinationGemini 3.1 Pro by 1.549.147.6+1.5
Following instructionsGemini 3.1 Pro
- IFBenchGemini 3.1 Pro by 38.177.139+38.1
Other results10 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- τ²-Bench Telecom (AA run)Gemini 3.1 Pro by 76.695.619+76.6
- LiveCodeBenchGemini 3.1 Pro by 6491.727.7+64
- Artificial Analysis Coding IndexGemini 3.1 Pro by 54.368.814.5+54.3
- AA-OmniscienceGemini 3.1 Pro by 4931.9-17.1+49
- Chinese SimpleQA (C-SimpleQA)Gemini 3.1 Pro by 35.585.950.4+35.5
- AA IntelligenceGemini 3.1 Pro by 22.429.77.3+22.4
- MMMLUGemini 3.1 Pro by 18.892.673.8+18.8
- MMLU-ProGemini 3.1 Pro by 17.79173.3+17.7
- AA Agentic IndexGemini 3.1 Pro by 410.36.3+4
- MMLUGemini 3.1 Pro by 492.688.6+4
Questions people ask
Which is better, Gemini 3.1 Pro or Llama 3.1 Instruct 405B?
Gemini 3.1 Pro wins all six areas where both have results: coding, agents, reasoning, facts, long documents and following instructions. Llama 3.1 Instruct 405B wins none.
Which is better for coding?
Gemini 3.1 Pro. It wins 4 of the 4 coding tests both models report; Llama 3.1 Instruct 405B wins none.
How do you compare the two?
We use the 23 benchmark tests both models have published scores on. The verdict counts the 13 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 10 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.