Is GPT-5.6 Sol better than Grok 4.6?

GPT-5.6 Sol (max) and Grok 4.6 (medium) are neck and neck on quality (68.0 vs 64.2, within the ±5.7 margin). The BenchLeader Index combines every independent quality benchmark; the two are within the margin of error as of 2026-10-25, so check the category scores for your use.

Which is cheaper, GPT-5.6 Sol or Grok 4.6, and will that change?

Grok 4.6 is cheaper today: $3.00 against $8.00 per million tokens, blended at three input tokens per output token. No price change has been announced for either.

Is GPT-5.6 Sol better than Grok 4.6 for coding?

GPT-5.6 Sol scores higher in coding (66 vs 62 on the category index, where 50 is average). On SciCode, the top shared coding benchmark, it is 57.1% for GPT-5.6 Sol against 55.9% for Grok 4.6.

Is GPT-5.6 Sol better than Grok 4.6 for agents and tool use?

Grok 4.6 scores higher in agentic tasks (74 vs 67 on the category index, where 50 is average). On τ³-Banking (AA), the top shared agents & tools benchmark, it is 44.3% for GPT-5.6 Sol against 44.3% for Grok 4.6.

Which is better for long documents?

GPT-5.6 Sol scores higher on long-context benchmarks (67 vs 66). GPT-5.6 Sol accepts more context: 1,050,000 against 500,000 tokens for Grok 4.6.

Which has lower latency?

Grok 4.6 (medium) answers first: 25.5 s against 69.5 s to the first answer token, as Artificial Analysis measures it. Reasoning effort drives most of this: a higher setting thinks longer before it answers.

Which is faster, GPT-5.6 Sol or Grok 4.6?

GPT-5.6 Sol streams faster: 89 against 78 output tokens per second.

When was Grok 4.6 released?

Grok 4.6 was released on 11 Aug 2026.

GPT-5.6 Sol vs Grok 4.6

Full profiles: GPT-5.6 Sol (OpenAI) and Grok 4.6 (SpaceXAI): every benchmark, price and rank.

Updated 25 Oct 2026 · Data from 9 sources

As of 25 Oct 2026, GPT-5.6 Sol (max) and Grok 4.6 (medium) are neck and neck on quality (68.0 vs 64.2 on the BenchLeader Index, inside the ±5.7 margin of error), and Grok 4.6 (medium) costs 2.7× less, which makes it the better buy for most workloads. Pick GPT-5.6 Sol for reasoning (72 vs 64); pick Grok 4.6 for knowledge (74 vs 65).

GPT-5.6 Sol benchmarks max OpenAI

Grok 4.6 benchmarks medium SpaceXAI Open in the comparison tool

Which to pick for…

The pick's numbers come first. Category scores on the BenchLeader scale (50 is the average model, 15 points one standard deviation). High confidence means a lead of half a standard deviation or more; under one point is called either.

Use case	Pick	Why	Confidence
Coding	GPT-5.6 Sol	66 vs 62 category score; SciCode 57.1% vs 55.9%	Medium
Agents & tool use	Grok 4.6	74 vs 67 category score; τ³-Banking (AA) 44.3% vs 44.3%	Medium
Reasoning	GPT-5.6 Sol	72 vs 64 category score; ARC-AGI-2 92.5% vs 61.3%	High
Knowledge	Grok 4.6	74 vs 65 category score; AA-Omniscience 28 vs 22.0	High
Long documents	GPT-5.6 Sol	67 vs 66 category score; AA-LCR 84.0% vs 81.0%	Medium
Lowest cost	Grok 4.6	$3.00 vs $8.00 per 1M blended; agentic coding session $0.144 vs $0.320	–
Fastest first answer	Grok 4.6	25.5 s (Grok 4.6 (medium)) vs 69.5 s (GPT-5.6 Sol (max)) to the first answer token	–
High volume on a budget	Neither flagship	A smaller model is usually the better fit: Cheapest good LLMs, Fastest LLMs	–

Key differences

GPT-5.6 Sol (max) and Grok 4.6 (medium) are neck and neck on quality (68.0 vs 64.2, within the ±5.7 margin).
GPT-5.6 Sol (max) is stronger in coding, composite, instruction following, long context, maths, multimodal, reasoning.
Grok 4.6 (medium) is stronger in agents & tools, knowledge.
Grok 4.6 (medium) is 2.7× cheaper ($3.00 vs $8.00 per 1M blended).

At a glance

Spec	GPT-5.6 Sol	Grok 4.6
Developer	OpenAI	SpaceXAI
Released	9 Jul 2026	11 Aug 2026
Context window (tokens)	1,050,000	500,000
Compared at	GPT-5.6 Sol (max)	Grok 4.6 (medium)
Open weights	No	No
Price in / out / cached input per 1M	$4.00 / $20.00 / $0.400	$2.00 / $6.00 / $0.500

Category by category

Category scores on the BenchLeader scale: 50 is the average evaluated model, 15 points is one standard deviation. A gap under one point is called level.

Category	GPT-5.6 Sol (max)	Grok 4.6 (medium)	Leader
Reasoning	72.4	64.4	GPT-5.6 Sol
Coding	65.9	62.3	GPT-5.6 Sol
Agents & tools	66.5	73.5	Grok 4.6
Maths	71.0	–	not comparable
Knowledge	65.3	74.1	Grok 4.6
Instruction following	71.1	–	not comparable
Multimodal	66.5	–	not comparable
Long context	67.1	65.6	GPT-5.6 Sol
Composite	82.0	77.4	GPT-5.6 Sol

Where sources disagree

Across the 18 benchmarks both have, GPT-5.6 Sol leads 14, Grok 4.6 leads 3 and 1 is a tie. Every overall index that rates both puts GPT-5.6 Sol ahead.

Overall index	GPT-5.6 Sol (max)	Grok 4.6 (medium)	Leader
BenchLeader Index	68.0	64.2	neck and neck
AA Intelligence Index v4.3.2	47.0	42.8	GPT-5.6 Sol
Arena Text	1485†	1456	GPT-5.6 Sol

Each publisher runs its own tasks, harnesses and effort settings, so their overall verdicts can differ; BenchLeader reconciles them on one scale. † measured at another effort setting of the same model (the publisher did not test the one compared here).

Price, speed and latency

List prices blended at three input tokens per output token. Per-task prices use the token counts on the methodology page; suite cost is what Artificial Analysis paid to run its whole Intelligence Index.

Measure	GPT-5.6 Sol (max)	Grok 4.6 (medium)
Blended price per 1M tokens	$8.00	$3.00
Input / output per 1M	$4.00 / $20.00	$2.00 / $6.00
Cached input per 1M	$0.400	$0.500
Price per task: chat reply	$0.0076	$0.0026
Price per task: summarize a 30-page report	$0.060	$0.028
Price per task: code edit	$0.054	$0.021
Price per task: agentic coding session	$0.320	$0.144
Price per task: structured extraction	$0.012	$0.0052
Cost to run a full benchmark suite	$1.99	$1.14
Output speed	89 tok/s	78 tok/s
Time to first answer	69.5 s	25.5 s
Time to a complete answer	75.1 s	31.9 s

Per token is not per task: on Artificial Analysis' full suite GPT-5.6 Sol (max) cost $1.99 and Grok 4.6 (medium) $1.14, because Grok 4.6 (medium) used about 1.5× as many tokens for the same work, which a per-token price hides.

Each model is compared at its best-ranked reasoning-effort setting. GPT-5.6 Sol (max) scores 68.0 and takes 69 s to its first answer token; GPT-5.6 Sol (xhigh) scores 66.6 in 17 s, GPT-5.6 Sol (high) scores 66.3 in 7 s. Grok 4.6 (medium) scores 64.2 and takes 25 s to its first answer token; Grok 4.6 (high) scores 62.9 in 25 s, Grok 4.6 (xhigh) scores 62.5 in 29 s. Higher effort means more thinking before the answer: better scores, longer waits and more tokens billed. How reasoning effort changes scores and cost.

Every benchmark

139 benchmarks, grouped by category; each name links to the board and its leaders. † measured at another effort setting of the same model, shown for reference and not counted as a win.

Metric	Publisher	GPT-5.6 Sol (max)	Grok 4.6 (medium)
BenchLeader Index	BenchLeader	68.0	64.2
Agents & tools score	BenchLeader	66.5	73.5
Coding score	BenchLeader	65.9	62.3
Composite score	BenchLeader	82.0	77.4
Instruction following score	BenchLeader	71.1	–
Knowledge score	BenchLeader	65.3	74.1
Long context score	BenchLeader	67.1	65.6
Maths score	BenchLeader	71.0	–
Multimodal score	BenchLeader	66.5	–
Reasoning score	BenchLeader	72.4	64.4
Blended price $/M	BenchLeader	$8.00	$3.00
Output speed	BenchLeader	89 tok/s	78 tok/s
Time to first answer	BenchLeader	69.5 s	25.5 s
Context window	BenchLeader	1,050,000 tokens	500,000 tokens
Reasoning
GPQA Diamond	Epoch AI Benchmarking Hub	93.5%	94.0%†
SimpleBench	SimpleBench	64.8%†	75.9%†
Arena Hard Prompts	Arena (LMArena)	1512†	1482†
LiveBench 2.0 Reasoning	LiveBench	91.7%†	91.2%†
LiveBench 1.0 Reasoning	LiveBench	91.7%	90.5%†
GPQA Diamond (AA)	Artificial Analysis	94.1%	93.5%
Humanity's Last Exam (AA)	Artificial Analysis	49.5%	42.1%
GPQA Diamond (Vals)	Vals AI	95.2%	94.7%†
EnigmaEval	Scale AI SEAL	37.1%†	–
Kagi LLM Benchmark	Kagi LLM Benchmark	67.0%†	–
ARC-AGI-1	ARC Prize	96.5%	87.5%
ARC-AGI-2	ARC Prize	92.5%	61.3%
ARC-AGI-3	ARC Prize	7.8%	2.1%†
CritPt	Artificial Analysis	32.3%	17.7%
MysteryMechanism	Vals AI	33.3%	30.6%†
Chess Puzzles	Epoch AI Benchmarking Hub	59.0%	33.0%†
Mystery Game Puzzles	Epoch AI Benchmarking Hub	58.0%	34.0%†
LMCA	Epoch AI Benchmarking Hub	58.4%	48.5%†
DTBench	Epoch AI Benchmarking Hub	95.5%	97.3%†
ForecastBench	ForecastBench	65.5%	65.5%†
BTF-3	Epoch AI Benchmarking Hub	13.7%	–
Coding
SciCode	SciCode	57.1%	55.9%
WeirdML	WeirdML	87.0%	67.3%†
FrontierCode	Cognition	47.5%†	48.0%†
GSO-Bench	GSO-Bench	76.5%†	–

Show all 139 benchmarks

Metric	Publisher	GPT-5.6 Sol (max)	Grok 4.6 (medium)
Coding
Arena Coding	Arena (LMArena)	1534†	1510†
Arena WebDev	Arena (LMArena)	1615†	1617†
LiveBench 2.0 Coding	LiveBench	89.7%†	89.1%†
LiveBench 1.0 Coding	LiveBench	83.9%	76.8%†
LiveCodeBench	Vals AI	82.6%	88.2%†
IOI	Vals AI	91.2%	47.6%†
SWE-bench (Vals)	Vals AI	96.2%	95.6%†
Code Migration	Vals AI	52.9%	44.6%†
ProgramBench	Vals AI	1.5%	1.0%†
Vibe Code Bench 1-100	Vals AI	20.0%	14.8%†
Vibe Code Bench v1.1	Vals AI	80.5%	76.2%†
SWE Atlas: Codebase QnA	Scale AI SEAL	46.0%†	–
SWE Atlas: Test Writing	Scale AI SEAL	45.9%†	–
MirrorCode	Epoch AI Benchmarking Hub	20.0%†	–
Surface Evolver Bench	Epoch AI Benchmarking Hub	93.1%†	–
DeepSWE v1.1	Epoch AI Benchmarking Hub	72.7%	67.5%
CursorBench	Cursor	41.7%	36.1%
ALE-Bench	Epoch AI Benchmarking Hub	2176.9	1508.1†
FrontierSWE	Epoch AI Benchmarking Hub	32.2%	25.3%†
Terminal-Bench 4.0 (AA)	Artificial Analysis	39.9%	13.1%
Terminal-Bench 2.1 (AA)	Artificial Analysis	88.0%	84.3%
Startrise Frontend	Startrise	66.2%†	72.1%†
Agents & tools
Terminal-Bench	Terminal-Bench	37.3%	20.3%†
OSWorld-Verified 2.0	OSWorld	27.3%	–
APEX-Agents	Mercor	–	65.3%†
Arena Agent	Arena (LMArena)	6.1†	0.6†
LiveBench Long Agentic	LiveBench	48.5%†	40.7%†
LiveBench Browser	LiveBench	88.0%†	64.0%†
LiveBench Agentic Coding	LiveBench	56.2%	57.0%†
Terminal-Bench Hard	Artificial Analysis	65.9%	–
τ²-Bench Telecom (AA)	Artificial Analysis	85.1%	–
Terminal-Bench 2.1 (Vals)	Vals AI	85.8%	78.3%†
HiL-Bench	Scale AI SEAL	32.3%†	–
τ³-bench Banking	τ²-bench	46.9%†	–
τ³-Banking (AA)	Artificial Analysis	44.3%	44.3%
ITBench SRE (AA)	Artificial Analysis	56.2%	–
Analyst Agent (AA)	Artificial Analysis	47.5%	41.3%†
CUA-bench	Vals AI	8.3%	–
CyberBench	Vals AI	76.3%	67.7%†
Finance Agent v2	Vals AI	53.8%	53.7%†
Harvey's Legal Agent Benchmark v1	Vals AI	2.5%	15.8%†
Legal Research Bench	Vals AI	48.1%	48.1%†
SkillsBench	Vals AI	54.1%	55.8%†
SREBench	Vals AI	30.5%	–
Tax Agent Bench	Vals AI	31.1%	33.1%†
Terminal-Bench 4.0 (Vals)	Vals AI	37.9%	17.2%†
Terminal-Bench Science	Vals AI	20.0%	11.4%†
Time Horizon Index: KSP	Vals AI	23.8%	5.8%†
Web Search Index	Vals AI	43.6%	–
Arena Search	Arena (LMArena)	1258†	–
BALROG	BALROG	60.0%	–
PostTrainBench	Epoch AI Benchmarking Hub	36.2%	–
GBAEval	Epoch AI Benchmarking Hub	52.6%†	–
Vending-Bench 2	Andon Labs	9619.4†	9047.0†
AutomationBench	Artificial Analysis	60.1%	63.1%
GDP.pdf (AA)	Artificial Analysis	27.2%	17.8%
EnterpriseOps-Gym	Artificial Analysis	42.9%	48.3%†
AA-Briefcase v1.1	Artificial Analysis	1479	1531†
Terminal-Bench-Science 0.1 (AA)	Artificial Analysis	22.4%	6.2%†
FACTS Search	Google	88.5%†	–
Maths
FrontierMath Tiers 1–3	Epoch AI Benchmarking Hub	89.1%	66.0%†
FrontierMath Tier 4	Epoch AI Benchmarking Hub	82.9%	31.7%†
OTIS Mock AIME	Epoch AI Benchmarking Hub	100.0%	97.8%†
ProofBench	Vals AI	83.0%	51.0%†
LiveBench Mathematics	LiveBench	96.2%	92.6%†
Arena Maths	Arena (LMArena)	1496†	1445†
Knowledge
SimpleQA Verified	Epoch AI Benchmarking Hub	69.7%	49.3%†
LiveBench 2.0 Data Analysis	LiveBench	79.8%†	75.3%†
LiveBench Research	LiveBench	54.5%†	84.5%†
LiveBench 1.0 Data Analysis	LiveBench	79.8%	73.9%†
AA-Omniscience	Artificial Analysis	22.0	28
MMLU-Pro	Vals AI	89.1%	89.4%†
LegalBench	Vals AI	87.0%	86.3%†
CorpFin	Vals AI	64.4%	66.2%†
TaxEval	Vals AI	74.8%	71.1%†
PRBench Finance	Scale AI SEAL	50.5%	–
PRBench Legal	Scale AI SEAL	50.5%	–
BioMysteryBench	Vals AI	71.1%	72.2%†
Excel Modeling Benchmark	Vals AI	72.3%	62.7%†
MedCode	Vals AI	44.0%	44.7%†
MedScribe	Vals AI	85.2%	86.5%†
Public Benefits Bench v1.1	Vals AI	66.5%	66.8%†
DrugDiscoveryBench	Scale AI SEAL	56.5%	–
EBR-bench	Epoch AI Benchmarking Hub	44.8%	30.5%†
GDP.pdf	Epoch AI Benchmarking Hub	30.7%	16.0%†
AA-Omniscience: accuracy	Artificial Analysis	59.4%	41.9%
AA-Omniscience: non-hallucination	Artificial Analysis	7.8%	76.0%
Instruction following
LiveBench Language	LiveBench	87.7%	83.7%†
LiveBench Instruction Following	LiveBench	71.8%	71.9%†
IFBench	Artificial Analysis	72.7%	–
Arena Instruction Following	Arena (LMArena)	1491†	1452†
Human preference
Arena Text	Arena (LMArena)	1485†	1456†
EQ-Bench 4	EQ-Bench	1240†	–
Arena Creative Writing	Arena (LMArena)	1470†	1443†
Arena Multi-turn	Arena (LMArena)	1490†	1448†
Arena Longer Queries	Arena (LMArena)	1499†	1475†
Multimodal
Arena Vision	Arena (LMArena)	1281†	1263†
LiveBench Design	LiveBench	81.6%†	79.8%†
MMMU-Pro	Artificial Analysis	83.4%	–
MMMU-Pro (Vals)	Vals AI	88.8%	–
MortgageTax	Vals AI	67.3%	64.2%†
SAGE	Vals AI	52.6%	28.9%†
Blueprint-Bench 2	Epoch AI Benchmarking Hub	33.6%†	33.2%†
Long context
AA-LCR	Artificial Analysis	84.0%	81.0%
Arena Document	Arena (LMArena)	1489†	1461†
MLCR	Artificial Analysis	30.0%	18.3%
Composite
Epoch Capabilities Index	Epoch AI Benchmarking Hub	162.8†	156.6†
LiveBench 2.0	LiveBench	76.3%†	74.9%†
LiveBench 1.0	LiveBench	81.0%	78.0%†
AA Intelligence Index v4.3.2	Artificial Analysis	47.0	42.8
Vals RSI Index	Vals AI	23.9%	25.5%†
Vals Science Index	Vals AI	41.5%	38.1%†
Vals Multimodal Index	Vals AI	72.6%	–
Safety & honesty
FORTRESS	Scale AI SEAL	20.1%†	–

Data as of 2026-10-25. Best configuration of each model; every score links to its source on the model pages.

What changed

25 Oct 2026 GPT-5.6 Sol (max): 1 new result (AA-Briefcase v1.1).
23 Oct 2026 GPT-5.6 Sol (max): 3 new results (Harvey's Legal Agent Benchmark v1, Vals RSI Index, Vals Science Index).
21 Oct 2026 GPT-5.6 Sol (max): 1 score revision.
21 Oct 2026 Grok 4.6 (medium): 1 new result (MLCR).
20 Oct 2026 GPT-5.6 Sol (max): 1 new result (ForecastBench).
18 Oct 2026 GPT-5.6 Sol (max): 5 new results (AutomationBench, GDP.pdf (AA), MLCR…).
18 Oct 2026 Grok 4.6 (medium): 15 new results (AA Intelligence Index v4.3.2, GPQA Diamond (AA), Humanity's Last Exam (AA)…).
16 Oct 2026 GPT-5.6 Sol (max): 1 score revision.
15 Oct 2026 GPT-5.6 Sol (max): 1 score revision.
15 Oct 2026 Grok 4.6 (medium): 1 score revision.

Rankings: Best LLM overall · Best LLM for agents · Best cheap LLMs