Provider Options

Provider options let you pass provider-specific configuration that goes beyond the standard settings shared by all providers. They are set via the providerOptions property on functions like generateText and streamText.

const result = await generateText({
  model: openai('gpt-5.2'),
  prompt: 'Explain quantum entanglement.',
  providerOptions: {
    openai: {
      reasoningEffort: 'low',
    },
  },
});

Provider options are namespaced by the provider name (e.g. openai, anthropic) so you can even include options for multiple providers in the same call — only the options matching the active provider are used. See Prompts: Provider Options for details on applying options at the message and message-part level.

Common Provider Options

The sections below cover the most frequently used provider options, focusing on reasoning and output control for OpenAI and Anthropic. For a complete reference, see the individual provider pages:

OpenAI

Reasoning Effort

For reasoning models (e.g. o3, o4-mini, gpt-5.2), reasoningEffort controls how much internal reasoning the model performs before responding. Lower values are faster and cheaper; higher values produce more thorough answers.

import {
  openai,
  type OpenAILanguageModelResponsesOptions,
} from '@ai-sdk/openai';
import { generateText } from 'ai';

const { text, usage, providerMetadata } = await generateText({
  model: openai('gpt-5.2'),
  prompt: 'Invent a new holiday and describe its traditions.',
  providerOptions: {
    openai: {
      reasoningEffort: 'low', // 'none' | 'minimal' | 'low' | 'medium' | 'high' | 'xhigh'
    } satisfies OpenAILanguageModelResponsesOptions,
  },
});

console.log('Reasoning tokens:', providerMetadata?.openai?.reasoningTokens);

Value	Behavior
`'none'`	No reasoning (GPT-5.1 models only)
`'minimal'`	Bare-minimum reasoning
`'low'`	Fast, concise reasoning
`'medium'`	Balanced (default)
`'high'`	Thorough reasoning
`'xhigh'`	Maximum reasoning (GPT-5.1-Codex-Max only)

'none' and 'xhigh' are only supported on specific models. Using them with unsupported models will result in an error.

Reasoning Summary

When working with reasoning models, you may want to see how the model arrived at its answer. The reasoningSummary option surfaces the model's thought process.

Streaming

import {
  openai,
  type OpenAILanguageModelResponsesOptions,
} from '@ai-sdk/openai';
import { streamText } from 'ai';

const result = streamText({
  model: openai('gpt-5.2'),
  prompt: 'Tell me about the Mission burrito debate in San Francisco.',
  providerOptions: {
    openai: {
      reasoningSummary: 'detailed', // 'auto' | 'detailed'
    } satisfies OpenAILanguageModelResponsesOptions,
  },
});

for await (const part of result.fullStream) {
  if (part.type === 'reasoning') {
    console.log(`Reasoning: ${part.textDelta}`);
  } else if (part.type === 'text-delta') {
    process.stdout.write(part.textDelta);
  }
}

Non-streaming

import {
  openai,
  type OpenAILanguageModelResponsesOptions,
} from '@ai-sdk/openai';
import { generateText } from 'ai';

const result = await generateText({
  model: openai('gpt-5.2'),
  prompt: 'Tell me about the Mission burrito debate in San Francisco.',
  providerOptions: {
    openai: {
      reasoningSummary: 'auto',
    } satisfies OpenAILanguageModelResponsesOptions,
  },
});

console.log('Reasoning:', result.reasoning);

Value	Behavior
`'auto'`	Condensed summary of reasoning
`'detailed'`	Comprehensive reasoning output

Text Verbosity

Control the length and detail of the model's text response independently of reasoning:

import {
  openai,
  type OpenAILanguageModelResponsesOptions,
} from '@ai-sdk/openai';
import { generateText } from 'ai';

const result = await generateText({
  model: openai('gpt-5-mini'),
  prompt: 'Write a poem about a boy and his first pet dog.',
  providerOptions: {
    openai: {
      textVerbosity: 'low', // 'low' | 'medium' | 'high'
    } satisfies OpenAILanguageModelResponsesOptions,
  },
});

Value	Behavior
`'low'`	Terse, minimal responses
`'medium'`	Balanced detail (default)
`'high'`	Verbose, comprehensive responses

Anthropic

Thinking (Extended Reasoning)

Anthropic's thinking feature gives Claude models a dedicated "thinking" phase before they respond. You enable it by providing a thinking object with a token budget.

import { anthropic, AnthropicLanguageModelOptions } from '@ai-sdk/anthropic';
import { generateText } from 'ai';

const { text, reasoning, reasoningText } = await generateText({
  model: anthropic('claude-opus-4-20250514'),
  prompt: 'How many people will live in the world in 2040?',
  providerOptions: {
    anthropic: {
      thinking: { type: 'enabled', budgetTokens: 12000 },
    } satisfies AnthropicLanguageModelOptions,
  },
});

console.log('Reasoning:', reasoningText);
console.log('Answer:', text);

The budgetTokens value sets the upper limit on how many tokens the model can use for its internal reasoning. Higher budgets allow deeper reasoning but increase latency and cost.

Thinking is supported on claude-opus-4-20250514, claude-sonnet-4-20250514, and claude-sonnet-4-5-20250929 models.

Effort

The effort option provides a simpler way to control reasoning depth without specifying a token budget. It affects thinking, text responses, and function calls.

import { anthropic, AnthropicLanguageModelOptions } from '@ai-sdk/anthropic';
import { generateText } from 'ai';

const { text, usage } = await generateText({
  model: anthropic('claude-opus-4-20250514'),
  prompt: 'How many people will live in the world in 2040?',
  providerOptions: {
    anthropic: {
      effort: 'low', // 'low' | 'medium' | 'high'
    } satisfies AnthropicLanguageModelOptions,
  },
});

Value	Behavior
`'low'`	Minimal reasoning, fastest responses
`'medium'`	Balanced reasoning
`'high'`	Thorough reasoning (default)

Fast Mode

For claude-opus-4-6, the speed option enables approximately 2.5x faster output token speeds:

import { anthropic, AnthropicLanguageModelOptions } from '@ai-sdk/anthropic';
import { generateText } from 'ai';

const { text } = await generateText({
  model: anthropic('claude-opus-4-6'),
  prompt: 'Write a short poem about the sea.',
  providerOptions: {
    anthropic: {
      speed: 'fast', // 'fast' | 'standard'
    } satisfies AnthropicLanguageModelOptions,
  },
});

Combining Options

You can combine multiple provider options in a single call. For example, using both reasoning effort and reasoning summaries with OpenAI:

import {
  openai,
  type OpenAILanguageModelResponsesOptions,
} from '@ai-sdk/openai';
import { generateText } from 'ai';

const result = await generateText({
  model: openai('gpt-5.2'),
  prompt: 'What are the implications of quantum computing for cryptography?',
  providerOptions: {
    openai: {
      reasoningEffort: 'high',
      reasoningSummary: 'detailed',
    } satisfies OpenAILanguageModelResponsesOptions,
  },
});

Or enabling thinking with a low effort level for Anthropic:

import { anthropic, AnthropicLanguageModelOptions } from '@ai-sdk/anthropic';
import { generateText } from 'ai';

const result = await generateText({
  model: anthropic('claude-opus-4-20250514'),
  prompt: 'Explain the Riemann hypothesis in simple terms.',
  providerOptions: {
    anthropic: {
      thinking: { type: 'enabled', budgetTokens: 8000 },
      effort: 'medium',
    } satisfies AnthropicLanguageModelOptions,
  },
});

Using Provider Options with the AI Gateway

Provider options work the same way when using the Vercel AI Gateway. Use the underlying provider name (e.g. openai, anthropic) as the key — not gateway. The AI Gateway forwards these options to the target provider automatically.

import type { OpenAILanguageModelResponsesOptions } from '@ai-sdk/openai';
import { generateText } from 'ai';

const result = await generateText({
  model: 'openai/gpt-5.2', // AI Gateway model string
  prompt: 'What are the implications of quantum computing for cryptography?',
  providerOptions: {
    openai: {
      reasoningEffort: 'high',
      reasoningSummary: 'detailed',
    } satisfies OpenAILanguageModelResponsesOptions,
  },
});

You can also combine gateway-specific options (like routing and fallbacks) with provider-specific options in the same call:

import type { AnthropicLanguageModelOptions } from '@ai-sdk/anthropic';
import type { GatewayLanguageModelOptions } from '@ai-sdk/gateway';
import { generateText } from 'ai';

const result = await generateText({
  model: 'anthropic/claude-sonnet-4',
  prompt: 'Explain quantum computing',
  providerOptions: {
    // Gateway-specific: control routing
    gateway: {
      order: ['vertex', 'anthropic'],
    } satisfies GatewayLanguageModelOptions,
    // Provider-specific: enable reasoning
    anthropic: {
      thinking: { type: 'enabled', budgetTokens: 12000 },
    } satisfies AnthropicLanguageModelOptions,
  },
});

For more on gateway routing, fallbacks, and other gateway-specific options, see the AI Gateway provider documentation.

Type Safety

Each provider exports a type for its options, which you can use with satisfies to get autocomplete and catch typos at build time:

import { type OpenAILanguageModelResponsesOptions } from '@ai-sdk/openai';
import { type AnthropicLanguageModelOptions } from '@ai-sdk/anthropic';

For a full list of available options, see the provider-specific documentation: