Spanlens

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09:33

2026-06-20

dev.to

large-language-models

Tracking token usage across OpenAI, Anthropic, and Gemini: every streaming gotcha I hit

A developer building Spanlens, an open-source LLM observability tool, found that OpenAI, Anthropic, and Gemini report token usage differently during streaming, requiring distinct parsing logic for eac…

13:00

2026-05-27

dev.to

large-language-models

5 gotchas I hit moving LLM logs from Postgres to ClickHouse

The developer behind Spanlens, an open-source LLM observability platform, migrated the platform's `requests` table from Supabase Postgres to ClickHouse after recognizing that the insert-heavy, append-…

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OpenAI 2 Anthropic 2 Gemini 2 Supabase 1 Postgres 1 ClickHouse 1 GitHub 1