The Right-Sized LLM Benchmark Cheapest LLM that's good enough.

GPT-5.6 Sol at a glance

Good enough on 28/52 tasks at the 90% bar. Best value on 0 tasks. Best fit for: Structured Data & Fact Extraction, Long-form Content Generation, Social & Promotional Content, Relevance, Classification

Provider
OpenAI
Model name
gpt-5.6-sol
Cost mode:
Qualifies on
28 / 52 tasks (at 90% bar)
Best value on
0 tasks

Cost vs quality across all tasks

0%25%50%75%100%8910Quality score (8–10)Cost-efficiency vs best value (1.0 = best value)Vetted News Site Selection — quality 8.45, 11.4x the cost of the best-value good-enough optionOnboarding Subject Analysis — quality 8.91, 14.1x the cost of the best-value good-enough optionContent Summarization — quality 9.00, 30.5x the cost of the best-value good-enough optionResearch Query Generation — quality 8.42, 5.7x the cost of the best-value good-enough optionTheme Generation — quality 9.19, 12.2x the cost of the best-value good-enough optionStructured Output Extraction — quality 9.56, 155.9x the cost of the best-value good-enough optionActivity Feed Blurb Generation — quality 8.20, 15.5x the cost of the best-value good-enough optionClaim-Referenced Analyst Writing — quality 8.86, 7.0x the cost of the best-value good-enough optionSubstack Newsletter — quality 8.78, 30.4x the cost of the best-value good-enough optionSocial Post Promotion — quality 8.59, 14.5x the cost of the best-value good-enough optionSubreddit Quality Vetting — quality 9.28, 9.8x the cost of the best-value good-enough optionS-1 TOC Extraction — quality 9.13, 11.6x the cost of the best-value good-enough optionAuthor Living-Person Safety Check — quality 9.01, 23.3x the cost of the best-value good-enough optionTopic Discovery Clustering — quality 9.36, 2.1x the cost of the best-value good-enough optionLanguage Detection — quality 10.00, 37.7x the cost of the best-value good-enough optionTopic Report Relevance Scoring — quality 9.27, 7.4x the cost of the best-value good-enough optionSubreddit Selection for Research — quality 8.60, 3.3x the cost of the best-value good-enough optionTopic Cluster Naming — quality 8.41, 11.6x the cost of the best-value good-enough optionTopic Grouping and Client Matching — quality 8.63, 15.7x the cost of the best-value good-enough optionEngagement Triage — quality 8.28, 38.1x the cost of the best-value good-enough optionPrompt Adaptation — quality 8.45, 21.4x the cost of the best-value good-enough optionOnboarding Chapter Outline Generation — quality 9.67, 28.6x the cost of the best-value good-enough optionX Post Selection — quality 8.47, 27.4x the cost of the best-value good-enough optionAuthor Voice Generation — quality 9.10, 24.7x the cost of the best-value good-enough optionSEC S-1 Chunk Analysis — quality 9.17, 13.7x the cost of the best-value good-enough optionImage Prompt Generation — quality 9.08, 34.0x the cost of the best-value good-enough optionEngagement Reply Draft — quality 8.44, 7.5x the cost of the best-value good-enough optionTopic-to-Section Assignment — quality 8.64, 46.1x the cost of the best-value good-enough option

within ~1.3× of the best-value model · 1.3–2× · >2× · ★ this model is the best-value pick on that task. Top-right = best quadrant. Only tasks where this model qualifies at the 90% bar are plotted.

Per-task breakdown

TaskCategoryQuality (% of best)ConfidenceOverpay
Topic Discovery Clustering bestTopic Organization & Clustering100%MEDIUM2.1x
Subreddit Selection for Research bestRelevance, Classification & Matching100%MEDIUM3.3x
Research Query GenerationInfrastructure & Utility98%HIGH5.7x
Claim-Referenced Analyst WritingLong-form Content Generation91%HIGH7x
Topic Report Relevance ScoringRelevance, Classification & Matching100%MEDIUM7.4x
Engagement Reply Draft bestSocial & Promotional Content100%RANKED7.5x
Subreddit Quality VettingRelevance, Classification & Matching98%MEDIUM9.8x
Vetted News Site Selection bestRelevance, Classification & Matching100%HIGH11x
S-1 TOC ExtractionStructured Data & Fact Extraction97%MEDIUM12x
Topic Cluster NamingTopic Organization & Clustering96%HIGH12x
Theme GenerationLong-form Content Generation95%HIGH12x
SEC S-1 Chunk AnalysisFinancial Analysis & Trading Decisions99%HIGH14x
Onboarding Subject AnalysisFinancial Analysis & Trading Decisions97%MEDIUM14x
Social Post PromotionSocial & Promotional Content97%HIGH14x
Activity Feed Blurb GenerationSocial & Promotional Content93%RANKED16x
Topic Grouping and Client Matching bestRelevance, Classification & Matching100%HIGH16x
Prompt AdaptationInfrastructure & Utility95%HIGH21x
Author Living-Person Safety CheckRelevance, Classification & Matching97%HIGH23x
Author Voice GenerationLong-form Content Generation94%RANKED25x
X Post SelectionRelevance, Classification & Matching97%RANKED27x
Onboarding Chapter Outline GenerationLong-form Content Generation99%RANKED29x
Substack NewsletterLong-form Content Generation95%RANKED30x
Content SummarizationContent Summarization & Synthesis95%MEDIUM31x
Image Prompt GenerationInfrastructure & Utility99%HIGH34x
Language DetectionRelevance, Classification & Matching99%RANKED38x
Engagement TriageRelevance, Classification & Matching93%MEDIUM38x
Topic-to-Section AssignmentTopic Organization & Clustering96%MEDIUM46x
Structured Output ExtractionStructured Data & Fact Extraction97%HIGH156x

Overpay — how much more you pay by running this model instead of the best-value model that clears the quality bar on that task (marked ★). "16x" means you overpay 16× — the same output for 16× the best-value good-enough option; ★ means this model is that option (no overpayment). Confidence — how sure we are about the quality score (more judgments + more agreement = higher confidence): RANKED many independent judges scored this model's outputs and their agreement is very high (most confident) — HIGH many judges have scored it and they mostly agree (well-pinned) — MEDIUM enough judges have weighed in to publish, but they disagree more than we'd like (treat with a small grain of salt). LOW-confidence cells are hidden everywhere on the site. See the methodology for the exact thresholds.