PriceIndex

AI model capabilities

AI models that support structured outputs

Compare models with schema-constrained responses for reliable application data. Compare 261 supporting models by input price, output price, context window and published intelligence. Find the cheapest option for a reference text workload, then check the serving API before you build.

261 supporting models29 AI providersUSD · prices per 1M tokens

Lowest reference cost

Llama 3.1 8B Instruct

$0.03

1M input + 250K output tokens. Tool fees and discounts excluded.

Highest published intelligence

Claude Opus 5.5

57.6 AA Intelligence Index

Among supporting models with a published score; not a capability-specific benchmark.

Cheapest AI models with structured outputs

Ranked by the cost of 1 million input and 250,000 output tokens at standard rates. A different token mix can change the cheapest model. Support requires an explicitly listed catalog feature, not an inference from a model family.

GLM 5.3 FlashZ.ai
Input /1M
$0.03
Output /1M
$0.08
Reference cost
$0.05
Context
1M
AA Intelligence
41.8
gpt-oss-20bOpenAI
Input /1M
$0.03
Output /1M
$0.13
Reference cost
$0.06
Context
131K
AA Intelligence
9
Gemma 3 4BGoogle
Input /1M
$0.05
Output /1M
$0.10
Reference cost
$0.08
Context
131K
AA Intelligence
4.8
Gemma 3 12BGoogle
Input /1M
$0.05
Output /1M
$0.15
Reference cost
$0.09
Context
131K
AA Intelligence
3.8
Solar Mini 4Upstage
Input /1M
$0.05
Output /1M
$0.20
Reference cost
$0.10
Context
524K
AA Intelligence
—

Showing 15 of 261

261 matching models · Missing intelligence scores are shown as —.

What is structured outputs?

Structured outputs constrain a response to a requested schema through a supported API. This is useful for extracting records, classifying documents and producing data your application can parse. Schema constraints, supported schema keywords and refusal handling depend on the serving API.

Before choosing a model

  • Check which schema features the serving API supports.
  • Validate the response and handle refusals or truncated outputs.
  • Test factual accuracy separately from schema compliance.

Estimate your actual workload

Use your request volume and prompt and response sizes to compare monthly text-token costs. Add any search, external tool or provider-specific charges separately. Standard token prices do not assume cache hits or batch discounts.

LLM token cost calculator Pricing methodology

Structured outputs FAQs

261 active models with positive input and output prices currently list structured outputs in the PriceIndex catalog. The table lists every match. A model is included only when its tracked feature data explicitly lists this capability; missing data is not treated as support.

Llama 3.1 8B Instruct has the lowest estimated text-token cost in this list for 1 million input tokens and 250,000 output tokens: $0.0300. A different input/output mix can change the ranking. This excludes tool fees, caching, discounts and taxes.

No. Capability availability can differ between serving APIs and model versions. Follow a model’s API documentation link and verify the exact version, endpoint and settings before choosing it.

We use standard USD input and output token prices: input price × 1 million tokens plus output price × 250,000 tokens, divided by 1 million. The directory excludes retired models, missing prices and zero-priced entries. Published AA Intelligence Index scores are shown when available and never estimated.

Check which schema features the serving API supports. Validate the response and handle refusals or truncated outputs. Test factual accuracy separately from schema compliance.

Explore more AI capabilities