GPT-5.6 Sol vs Grok 4.6
Wins 6 of 8 areas
Coding · Reasoning · Facts · Images and charts · Math · Long documents
Wins 0 of 8 areas
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GPT-5.6 Sol is the stronger all-rounder.Grok 4.6 is cheaper.
Both rank among the ten best models we track in reasoning.
Scores updated · 35 tests both models report · How we compare
Where each one wins
Tests won in each of the eight areas we test. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- ReasoningHard problems that need careful thinking51GPT-5.6 Sol5 of 7 tests · 1 tie
- MathCompetition and research-level math30GPT-5.6 Sol3 of 3 tests
- CodingWriting and fixing software20GPT-5.6 Sol2 of 5 tests · 3 ties
- FactsGetting facts right instead of making them up21GPT-5.6 Sol2 of 3 tests
- Images and chartsUnderstanding pictures, charts and video10GPT-5.6 Sol1 of 1 test
- Long documentsFinding answers in very long texts10GPT-5.6 Sol1 of 1 test
- AgentsCarrying out multi-step tasks on its own22Even2 each
- Following instructionsDoing exactly what it is asked00Even0 each · 1 tie
Images and charts, 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.
Grok 4.6 costs 67% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where GPT-5.6 Sol pulls ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+51.3points ahead
- Abstract visual puzzles that people can solveARC-AGI-2+25.4points ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+23.1points ahead
Where Grok 4.6 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+68.2points ahead
- Long professional tasks in banking, consulting and lawAA ApexAgents+17.6points ahead
- Common-sense trick questionsSimpleBench+11.1points ahead
Every test, side by side
All 35 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-5.6 Sol
- LiveBench · CodingGPT-5.6 Sol by 7.183.976.8+7.1
- SciCodeGPT-5.6 Sol by 4.157.153+4.1
- LiveBench · Agentic Codingtie56.257tie
- LMArena · WebDevtie16181617tie
- Terminal-Bench 2.1tie8888tie
AgentsEven
- Terminal-Bench 4.0GPT-5.6 Sol by 22.739.917.2+22.7
- AA ApexAgentsGrok 4.6 by 17.639.957.5+17.6
- GDPValGrok 4.6 by 1.755.657.3+1.7
- τ-Bench V3 · BankingGPT-5.6 Sol by 144.343.3+1
ReasoningGPT-5.6 Sol
- ARC-AGI-2GPT-5.6 Sol by 25.492.567.1+25.4
- CritPtGPT-5.6 Sol by 12.632.319.7+12.6
- SimpleBenchGrok 4.6 by 11.164.875.9+11.1
- ARC-AGI-3GPT-5.6 Sol by 5.77.82.1+5.7
- Humanity's Last ExamGPT-5.6 Sol by 5.449.544.1+5.4
- LiveBench · ReasoningGPT-5.6 Sol by 1.291.790.5+1.2
- GPQA Diamondtie94.193.5tie
FactsGPT-5.6 Sol
- AA-Omniscience · Non-hallucinationGrok 4.6 by 68.27.876+68.2
- SimpleQA VerifiedGPT-5.6 Sol by 20.869.748.9+20.8
- AA-Omniscience · AccuracyGPT-5.6 Sol by 16.459.443+16.4
Images and chartsGPT-5.6 Sol
- LMArena · VisionGPT-5.6 Sol by 14 rating points12791265+14 rating
MathGPT-5.6 Sol
- FrontierMath Tier 4GPT-5.6 Sol by 51.38331.7+51.3
- FrontierMath Tiers 1-3 (v2)GPT-5.6 Sol by 23.189.166+23.1
- LiveBench · MathematicsGPT-5.6 Sol by 3.696.292.6+3.6
Following instructionsEven
- LiveBench · Instruction Followingtie71.871.9tie
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.
- Terminal-Bench 4.0GPT-5.6 Sol by 1737.320.3+17
- ARC-AGI-1GPT-5.6 Sol by 9.596.587+9.5
- Terminal-bench 3.0GPT-5.6 Sol by 8.434.426+8.4
- AA-OmniscienceGrok 4.6 by 7.32229.3+7.3
- DeepSWE 1.1GPT-5.6 Sol by 7.17365.9+7.1
- livebench_data_analysisGPT-5.6 Sol by 5.979.873.9+5.9
- livebench_languageGPT-5.6 Sol by 487.783.7+4
- AA IntelligenceGPT-5.6 Sol by 2.84744.2+2.8
- AA Agentic IndexGrok 4.6 by 2.250.552.7+2.2
- Artificial Analysis Coding IndexGPT-5.6 Sol by 1.577.475.9+1.5
Questions people ask
Which is better, GPT-5.6 Sol or Grok 4.6?
GPT-5.6 Sol wins six of the eight areas we test: coding, reasoning, facts, images and charts, math and long documents. Grok 4.6 wins none, but costs 67% less. They are level on agents and following instructions.
Which is better for coding?
GPT-5.6 Sol. It wins 2 of the 5 coding tests both models report; Grok 4.6 wins none, and 3 are ties.
Which is cheaper?
GPT-5.6 Sol costs $4.00 per million input tokens and $20.00 per million output tokens; Grok 4.6 costs $2.00 and $6.00. That makes Grok 4.6 about 67% cheaper for the same work.
How do you compare the two?
We use the 35 benchmark tests both models have published scores on. The verdict counts the 25 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.