OFFICIAL REFERENCES / CHECKED SEP 12, 2026

Go straight to the source.

The provider documentation behind the field guides. References explain the rules; your account determines the terms that actually apply.

How these sources are used. Official documentation supports provider-specific statements. Worked calculations and suggested evaluation processes are original editorial examples. This is not a live price feed, and a reviewed page does not guarantee that a policy will stay unchanged.

Some documentation describes rollout stages or account-specific exceptions. Check the actual console and applicable agreement when a general page cannot resolve your account’s situation. Provider names and links do not imply affiliation.

OpenAI · Prepaid API billing

Credit purchases, reload controls, expiration, and delayed balance updates.

Read the official documentation ↗CHECKED SEP 12, 2026

OpenAI · ChatGPT and API billing separation

The separate billing systems for ChatGPT and the API platform.

Read the official documentation ↗CHECKED SEP 12, 2026

OpenAI · Service credit terms

Issuer-specific conditions, including restrictions on purported transfers and sales.

Read the official documentation ↗CHECKED SEP 12, 2026

OpenAI · Batch API

Asynchronous processing, supported use cases, and batch constraints.

Read the official documentation ↗CHECKED SEP 12, 2026

Anthropic · Paying for Claude API usage

Direct Console funding, invoicing arrangements, reloads, and purchased-credit terms.

Read the official documentation ↗CHECKED SEP 12, 2026

Anthropic · Claude subscription versus API access

Why a paid chat subscription does not replace direct API billing.

Read the official documentation ↗CHECKED SEP 12, 2026

Anthropic · Claude API rate limits

The distinction between spending constraints and request or token throughput.

Read the official documentation ↗CHECKED SEP 12, 2026

Anthropic · Prompt caching

Cache controls, usage components, and model-specific technical conditions.

Read the official documentation ↗CHECKED SEP 12, 2026

Grok / xAI · API billing

Team-level prepaid credits, automatic top-ups, and invoiced spending.

Read the official documentation ↗CHECKED SEP 12, 2026

Grok / xAI · Models and pricing

Model-specific pricing references and links to additional capabilities.

Read the official documentation ↗CHECKED SEP 12, 2026

Google · Gemini API billing

Free-tier and paid access, Prepay and Postpay, and promotional-credit prerequisites.

Read the official documentation ↗CHECKED SEP 12, 2026

Google · Gemini API pricing

Metering, model-specific rates, and applicable tier-related data-use information.

Read the official documentation ↗CHECKED SEP 12, 2026

Google · Gemma open models

The Gemma model family and its deployment ecosystem.

Read the official documentation ↗CHECKED SEP 12, 2026

Mistral · Activate Studio

Developer access, Free mode, and initial credential setup.

Read the official documentation ↗CHECKED SEP 12, 2026

Mistral · Model documentation

Model families, licensing labels, and links to service-specific details.

Read the official documentation ↗CHECKED SEP 12, 2026

DeepSeek · Context caching

Cache behavior, reported hit and miss usage, and best-effort limitations.

Read the official documentation ↗CHECKED SEP 12, 2026

DeepSeek · Models and pricing

The current distinction between billable token components for available models.

Read the official documentation ↗CHECKED SEP 12, 2026

DeepSeek · Chat completion reference

Usage response fields, output components, and request configuration.

Read the official documentation ↗CHECKED SEP 12, 2026

Alibaba Cloud · Model Studio free quotas

Eligible regional scope, quota validity, and quota-only controls.

Read the official documentation ↗CHECKED SEP 12, 2026

Alibaba Cloud · Model inference pricing

Model-, mode-, and region-specific inference pricing.

Read the official documentation ↗CHECKED SEP 12, 2026

Alibaba Cloud · Billing and cost management

How different access plans and billing arrangements are distinguished.

Read the official documentation ↗CHECKED SEP 12, 2026

Alibaba Cloud · Token Plan

A specific credit-based subscription, separate from generic tokenized-credit claims.

Read the official documentation ↗CHECKED SEP 12, 2026

Google Cloud · AI startup program

Official eligibility, staged benefits, and award conditions.

Read the official documentation ↗CHECKED SEP 12, 2026