The Progress Index shows how quickly the frontier has moved. GPT-3.5 Turbo, released in November 2022, scores 125. The highest score among released models passed 200 with OpenAI's first reasoning models in late 2024, 250 with o3 in April 2025, 300 with GPT-5.3 Codex in February 2026 and 325 with Claude Fable 5 in June 2026.
Progress Index: top released model score rises from 125 to 325
AIArtificial Analysis's Progress Index scores GPT-3.5 Turbo, released in November 2022, at 125. The highest score among released models passed 200 with OpenAI's first reasoning models in late 2024, reached 250 with o3 in April 2025, 300 with GPT-5.3 Codex in February 2026, and 325 with Claude Fable 5 in June 2026.
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Original title: The Progress Index shows how quickly the frontier has moved. GPT-3.5 Turbo, released in November 2022, scores 125. The highest score amon...