GPT-5.6 Sol vs gpt-oss-120b: Release Comparison

Name: Artificial Analysis Intelligence Index
Creator: Artificial Analysis
License: https://artificialanalysis.ai/docs/legal/Terms-of-Use.pdf

Comparison of the GPT-5.6 Sol and gpt-oss-120b releases: 6 and 2 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 8 models.

For intelligence, GPT-5.6 Sol scores highest: GPT-5.6 Sol (max) at 47, against gpt-oss-120b (high) at 12 for gpt-oss-120b.
For output speed, gpt-oss-120b is fastest: gpt-oss-120b (high) at 205 t/s, against GPT-5.6 Sol (max) at 65 t/s for GPT-5.6 Sol.
For cost per task, gpt-oss-120b is cheapest: gpt-oss-120b (high) at $0.11, against GPT-5.6 Sol (low) at $0.26 for GPT-5.6 Sol.

Releases compared

Intelligence

Artificial Analysis Intelligence Index

Artificial Analysis Intelligence Index v4.3 incorporates 10 evaluations: AA-Briefcase, GDPval-AA v2, AutomationBench-AA, Terminal-Bench 4.0, SciCode, Humanity's Last Exam, GDP.pdf, CritPt, AA-Omniscience, AA-LCR v1.1

Estimate (independent evaluation forthcoming)

Artificial Analysis Intelligence Index v4.3 includes: AA-Briefcase, GDPval-AA v2, AutomationBench-AA, Terminal-Bench 4.0, SciCode, Humanity's Last Exam, GDP.pdf, CritPt, AA-Omniscience, AA-LCR v1.1. See Intelligence Index methodology for further details, including a breakdown of each evaluation and how we run them.

Intelligence Index vs. Cost per Intelligence Index Task

Artificial Analysis Intelligence Index · Weighted average cost (USD) per Artificial Analysis Intelligence Index task

Most attractive quadrant

GPT-5.6 Sol

Pareto line

Weighted average cost per Intelligence Index task. Each evaluation’s cost is calculated from input, cache hit, cache write, reasoning, and answer token prices, divided by task count, and weighted by its Intelligence Index weight.

Cost

Cost per Intelligence Index Task

Weighted average cost (USD) per Artificial Analysis Intelligence Index task, segmented by token type. Lower is better

Speed & Latency

Output Speed

Output tokens per second · Higher is better

Tokens per second received while the model is generating tokens (ie. after first chunk has been received from the API for models which support streaming).

Figures represent performance of the model's first-party API (e.g. OpenAI for o1) or the median across providers where a first-party API is not available (e.g. Meta's Llama models).

Capability Scores

Capability Indices

Measures the performance of models on specific capabilities and industries

Finance & Accounting Index

Incorporates 7 evaluations: AA-Omniscience, GDPval-AA v2, AA-Briefcase, Humanity's Last Exam, AutomationBench-AA, AA-LCR v1.1, GDP.pdf · Higher is better

Strategy & Ops Index

Incorporates 6 evaluations: AA-Omniscience, GDPval-AA v2, AA-Briefcase, AutomationBench-AA, AA-LCR v1.1, GDP.pdf · Higher is better

Legal Index

Incorporates 7 evaluations: AA-Omniscience, GDPval-AA v2, AA-Briefcase, Humanity's Last Exam, AA-LCR v1.1, GDP.pdf, AutomationBench-AA · Higher is better

Healthcare & Medical Index

Incorporates 6 evaluations: AA-Omniscience, GDPval-AA v2, AA-Briefcase, MLCR-AA, Humanity's Last Exam, AutomationBench-AA · Higher is better

Engineering Index

Incorporates 6 evaluations: AA-Omniscience, Humanity's Last Exam, CritPt, GDPval-AA v2, AA-Briefcase, Terminal-Bench 4.0 · Higher is better

Economics Index

Incorporates 5 evaluations: AA-Omniscience, Humanity's Last Exam, GDPval-AA v2, AA-Briefcase, AA-LCR v1.1 · Higher is better

Further details


																												Input modality	Output modality	Weights			Provider Benchmarks
GPT-5.6 Sol (max)	OpenAI	47	49	55	50	46	49	53	$1.99	$3.1	$4.00	$20.00	$0.40	$3,465	29k	17k	90M	65	94.96s	94.96s	102.69s	450.44s	-	1M	Jul 2026	-	Yes	Supports: text and image	Supports: text	Not available	-		View
GPT-5.6 Sol (xhigh)	OpenAI	44	47	52	49	43	45	52	$1.18	$3.1	$4.00	$20.00	$0.40	$2,082	20k	10k	51M	64	36.15s	36.15s	43.93s	308.51s	-	1M	Jul 2026	-	Yes	Supports: text and image	Supports: text	Not available	-		View
GPT-5.6 Sol (high)	OpenAI	42	46	51	48	42	43	50	$0.81	$3.1	$4.00	$20.00	$0.40	$1,487	13k	6k	34M	57	9.67s	9.67s	18.38s	229.62s	-	1M	Jul 2026	-	Yes	Supports: text and image	Supports: text	Not available	-		View
GPT-5.6 Sol (medium)	OpenAI	39	43	49	45	39	40	48	$0.50	$3.1	$4.00	$20.00	$0.40	$997	8k	3k	21M	60	3.39s	3.39s	11.77s	131.41s	-	1M	Jul 2026	-	Yes	Supports: text and image	Supports: text	Not available	-		View
GPT-5.6 Sol (low)	OpenAI	34	39	42	42	36	35	45	$0.26	$3.1	$4.00	$20.00	$0.40	$637	4k	837	13M	59	3.13s	3.13s	11.54s	64.97s	-	1M	Jul 2026	-	Yes	Supports: text and image	Supports: text	Not available	-		View
GPT-5.6 Sol (Non-reasoning)	OpenAI	28	30	33	31	-	-	32	-	$3.1	$4.00	$20.00	$0.40	-	-	-	-	63	1.23s	1.23s	9.16s	-	-	1M	Jul 2026	-	No	Supports: text and image	Supports: text	Not available	-		View
gpt-oss-120b (high)	OpenAI	12	13	9	12	12	16	19	$0.11	$0.2	$0.15	$0.595	$0.125	$122	27k	15k	84M	205	0.84s	10.58s	13.01s	130.69s	117B 5.1B active at inference time	131k	Aug 2025	May 2024	Yes	Supports: text	Supports: text	🤗	Apache 2.0	+14	View
gpt-oss-120b (low)	OpenAI	10	-	-	-	-	-	-	-	$0.2	$0.15	$0.545	$0.15	-	-	-	-	202	0.84s	10.71s	13.18s	-	117B 5.1B active at inference time	131k	Aug 2025	May 2025	Yes	Supports: text	Supports: text	🤗	Apache 2.0	+14	View

GPT-5.6 Sol vs gpt-oss-120b: Release Comparison

Intelligence

Artificial Analysis Intelligence Index

Artificial Analysis Intelligence Index

Intelligence Index vs. Cost per Intelligence Index Task

Cost per Intelligence Index Task

Artificial Analysis Intelligence Index

Cost

Cost per Intelligence Index Task

Cost per Intelligence Index Task

Speed & Latency

Output Speed

Output Speed

Model Performance Representation

Capability Scores

Capability Indices

Further details