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

GPT-5.4 Nano at a glance

Good enough on 9/52 tasks at the 90% bar. Best value on 2 tasks. Best fit for: Financial Analysis & Trading Decisions. Doesn't qualify on any: Social & Promotional Content, Topic Organization & Cluste

Provider
OpenAI
Model name
gpt-5.4-nano
Cost mode:
Qualifies on
9 / 52 tasks (at 90% bar)
Best value on
2 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)Content Summarization — quality 9.48, this model IS the best-value good-enough option★Structured Output Extraction — quality 9.46, 19.0x the cost of the best-value good-enough optionOnboarding Chapter Prompt Adaptation — quality 8.17, 2.3x the cost of the best-value good-enough optionTrading Recommendation — quality 7.84, this model IS the best-value good-enough option★Language Detection — quality 9.92, 1.5x the cost of the best-value good-enough optionExecutive Summary Generation — quality 7.47, 2.5x the cost of the best-value good-enough optionEngagement Triage — quality 8.42, 1.6x the cost of the best-value good-enough optionAuthor Voice Generation — quality 8.78, 4.6x the cost of the best-value good-enough optionSEC S-1 Chunk Analysis — quality 8.45, 1.5x 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
Trading Recommendation ★Financial Analysis & Trading Decisions91%HIGHbest value
Content Summarization ★ bestContent Summarization & Synthesis100%RANKEDbest value
Language DetectionRelevance, Classification & Matching99%RANKED1.5x
SEC S-1 Chunk AnalysisFinancial Analysis & Trading Decisions92%RANKED1.5x
Engagement TriageRelevance, Classification & Matching94%RANKED1.6x
Onboarding Chapter Prompt AdaptationInfrastructure & Utility90%HIGH2.3x
Executive Summary GenerationContent Summarization & Synthesis94%HIGH2.5x
Author Voice GenerationLong-form Content Generation90%RANKED4.6x
Structured Output ExtractionStructured Data & Fact Extraction96%HIGH19x

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.