Which is better, GPT-5.6 Sol or Kimi K2.6?

Across 52 shared benchmarks tracked on Vector Wire, GPT-5.6 Sol leads on 47 and Kimi K2.6 leads on 5 — GPT-5.6 Sol leads on more. Strengths differ by axis; the table below shows every head-to-head number with provenance.

SEEDRefresh Models —Deals —Regulatory —Sources —

GPT-5.6 Sol vs Kimi K2.6

OpenAIvsMoonshot52 shared benchmarks47–5 head-to-head

Benchmark	GPT-5.6 Sol	Kimi K2.6
AA Agentic Index	57.8	58.7
AA Intelligence	61	45.1
AA-LCR	77.7	76.7
AA-Omniscience	22	6.4
aime_2026	99.9	96.4
apex_agents	56.7	27.9
arena_elo	1482	1461
arena_text_factuality	1474	1455
Artificial Analysis Coding Index	78.3	61.8
baby_vision_with_python	88.9	68.5
browsecomp	90.4	86.3
BrowseComp (w/ Ctx)	89.4	83.2
charxiv_rq	87.8	86.7
coding_arena_elo	1619	1509
critpt	32.3	8
Finance Agent v2	53.8	44.9
FORTRESS (Adversarial)	82.4	65.6
FORTRESS (Benign)	98.1	97.2
gdpval	61.1	41.4
GDPval-AA v2	1748	1190
Global-MMLU-Lite	91.8	88.4
GPQA Diamond	94.6	91.1
HiL-Bench	32.3	18.7
HLE	49.5	37.5
HLE (with tools)	58	54
IFBench	72.7	76
itbenchSre	56.2	31.2
livebench_agentic_coding	56.2	46.9
livebench_coding	83.9	78.6
livebench_data_analysis	79.8	65.1
livebench_instruction_following	71.8	64.4
livebench_language	87.7	75.1
livebench_math	96.2	84.3
livebench_reasoning	91.7	79.4
mathvision	95.8	93.2
MCP Atlas	83.6	68.1
MMMU-Pro	84.6	80.1
OmniScience Accuracy	59.4	32.8
OmniScience Non-Hallucination	10.6	60.7
OSWorld-Verified	83	73.1
scicode	56.9	53.5
simpleqa_verified	71.6	38.7
strongreject	98.5	99.8
SWE-bench Pro	64.6	58.6
SWEBench Pro (Public)	64.6	58.6
Tau 3 Banking	33	20.6
TauBench V3 - Banking	44.3	23.3
Terminal Bench 2.1 (Best Harness)	89.5	71.3
Terminal-Bench 2.1	89.5	65.9
Terminal-Bench Hard	65.9	43.9
toolathlon	58	50
τ²-Bench Telecom (AA run)	85.1	95.9

Best tracked score per model per benchmark (default configuration; source-attributed). ↓ marks lower-is-better metrics. Open either model for its full surface, provenance and pricing.