PDF and Document Input in Claude, GPT, and Gemini
Compare document handling in Claude, GPT, and Gemini APIs: request payloads, file limits, non-PDF handling, and token implications.
Topic
Models & APIs
How the major model APIs behave in practice, checked against their own documentation.
Gemini 3.7 Flash Deprecation: Migrating to Gemini 3.8 Flash
Understand the 2026-10-08 Gemini API deprecations, automatic routing changes, thinking level updates, and migration steps for Deep Research agents.
Sending Images to Claude, GPT and Gemini: Formats and Limits
Compare image input methods, request structures, payload limits, and model token costs across Anthropic Claude, OpenAI GPT, and Google Gemini.
Streaming LLM Responses: Event Schemas for Claude, GPT, and Gemini
Compare server-sent event protocols, payload lifecycles, thinking deltas, and SDK handling across Claude, GPT-6, and Gemini APIs.
Function and Tool Calling Across Claude, GPT, and Gemini
Compare tool calling schemas, execution flows, multi-turn states, and token pricing across Claude, GPT, and Gemini APIs.
Structured Outputs Across Claude, GPT, and Gemini APIs
Compare JSON schema enforcement across Anthropic, OpenAI, and Google: API parameter shapes, SDK tooling, strict constraints, and pricing tiers.
Claude Sonnet 4.5 Deprecation: Migrating to Sonnet 5.5
Anthropic announced the deprecation of Claude Sonnet 4.5 with retirement set for November 30, 2026. Learn how to update API calls and migrate to Sonnet 5.5.
Gemini responseSchema in Production: What Structured Output Fixed
Lessons from using Gemini JSON mode with responseSchema: minItems for length, required fields, schema descriptions, source_ids validation, Korean keyword counting.
Why LLM Token Counts Differ Between Models (and How to Measure Them)
Same text, different token counts: tokenizer changes like Claude 4.7+'s ~30% more tokens, non-English text, code, and official token counting endpoints.