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

GPT-5.5 at a glance

Good enough on 30/52 tasks at the 90% bar. Best value on 0 tasks. Best fit for: Financial Analysis & Trading Decisions, Structured Data & Fact Extraction, Long-form Content Generation.

Provider
OpenAI
Model name
gpt-5.5
Cost mode:
Qualifies on
30 / 52 tasks (at 90% bar)
Best value on
0 tasks

Cost vs quality across all tasks

0%25%50%75%100%78910Quality score (7–10)Cost-efficiency vs best value (1.0 = best value)Vetted News Site Selection — quality 8.41, 20.5x the cost of the best-value good-enough optionResearch Query Generation — quality 8.56, 9.9x the cost of the best-value good-enough optionTheme Generation — quality 9.00, 20.8x the cost of the best-value good-enough optionStructured Output Extraction — quality 8.96, 513.4x the cost of the best-value good-enough optionActivity Feed Blurb Generation — quality 8.65, 21.9x the cost of the best-value good-enough optionResearch Query Validation — quality 8.64, 17.7x the cost of the best-value good-enough optionSubstack Newsletter — quality 8.95, 74.9x the cost of the best-value good-enough optionInvestment Panel Voting — quality 8.65, 7.9x the cost of the best-value good-enough optionGeographic Region Identification — quality 8.77, 11.3x the cost of the best-value good-enough optionSocial Post Promotion — quality 8.16, 12.7x the cost of the best-value good-enough optionOnboarding Chapter Prompt Adaptation — quality 9.05, 89.7x the cost of the best-value good-enough optionTrading Recommendation — quality 8.61, 30.1x the cost of the best-value good-enough optionSEC Filing Analysis — quality 8.99, 20.8x the cost of the best-value good-enough optionS-1 TOC Extraction — quality 8.46, 24.8x the cost of the best-value good-enough optionAuthor Living-Person Safety Check — quality 9.14, 59.3x the cost of the best-value good-enough optionLanguage Detection — quality 9.95, 37.4x the cost of the best-value good-enough optionExecutive Summary Generation — quality 7.93, 55.5x the cost of the best-value good-enough optionTopic Report Relevance Scoring — quality 8.45, 4.3x the cost of the best-value good-enough optionPublication Title Generation — quality 8.11, 47.2x the cost of the best-value good-enough optionTopic Cluster Naming — quality 8.67, 9.8x the cost of the best-value good-enough optionTopic Grouping and Client Matching — quality 8.11, 20.6x the cost of the best-value good-enough optionEngagement Triage — quality 8.51, 55.1x the cost of the best-value good-enough optionPrompt Adaptation — quality 8.32, 104.5x the cost of the best-value good-enough optionX Post Selection — quality 8.75, 24.7x the cost of the best-value good-enough optionAuthor Voice Generation — quality 9.23, 117.0x the cost of the best-value good-enough optionAuthor Matching — quality 8.43, 6.4x the cost of the best-value good-enough optionSEC S-1 Chunk Analysis — quality 9.04, 28.3x the cost of the best-value good-enough optionImage Prompt Generation — quality 8.45, 90.3x the cost of the best-value good-enough optionEngagement Reply Draft — quality 8.30, 8.8x the cost of the best-value good-enough optionTopic-to-Section Assignment — quality 8.57, 23.1x 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 Report Relevance ScoringRelevance, Classification & Matching91%HIGH4.3x
Author MatchingRelevance, Classification & Matching93%HIGH6.4x
Investment Panel VotingFinancial Analysis & Trading Decisions95%MEDIUM7.9x
Engagement Reply DraftSocial & Promotional Content98%HIGH8.8x
Topic Cluster NamingTopic Organization & Clustering99%RANKED9.8x
Research Query Generation bestInfrastructure & Utility100%MEDIUM9.9x
Geographic Region IdentificationStructured Data & Fact Extraction93%RANKED11x
Social Post PromotionSocial & Promotional Content92%HIGH13x
Research Query ValidationInfrastructure & Utility100%HIGH18x
Vetted News Site SelectionRelevance, Classification & Matching99%MEDIUM21x
Topic Grouping and Client MatchingRelevance, Classification & Matching94%MEDIUM21x
SEC Filing AnalysisFinancial Analysis & Trading Decisions92%RANKED21x
Theme GenerationLong-form Content Generation93%HIGH21x
Activity Feed Blurb GenerationSocial & Promotional Content98%RANKED22x
Topic-to-Section AssignmentTopic Organization & Clustering95%HIGH23x
X Post Selection bestRelevance, Classification & Matching100%RANKED25x
S-1 TOC ExtractionStructured Data & Fact Extraction90%MEDIUM25x
SEC S-1 Chunk AnalysisFinancial Analysis & Trading Decisions98%RANKED28x
Trading RecommendationFinancial Analysis & Trading Decisions99%RANKED30x
Language DetectionRelevance, Classification & Matching99%RANKED37x
Publication Title GenerationContent Summarization & Synthesis90%RANKED47x
Engagement TriageRelevance, Classification & Matching95%RANKED55x
Executive Summary Generation bestContent Summarization & Synthesis100%MEDIUM56x
Author Living-Person Safety CheckRelevance, Classification & Matching98%MEDIUM59x
Substack NewsletterLong-form Content Generation97%HIGH75x
Onboarding Chapter Prompt Adaptation bestInfrastructure & Utility100%RANKED90x
Image Prompt GenerationInfrastructure & Utility92%RANKED90x
Prompt AdaptationInfrastructure & Utility93%RANKED104x
Author Voice GenerationLong-form Content Generation95%MEDIUM117x
Structured Output ExtractionStructured Data & Fact Extraction91%MEDIUM513x

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.