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Migration — AI news & analysis
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Every Pick Right story tagged migration — 8 articles, newest first. All news →
OpenAI gives GPT-4o and GPT-4.1 92 days — half the notice the same family got in April
On 14 October 2026 OpenAI deprecated the last GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini snapshots with a 14 January 2027 shutdown — 92 days, against the 184 days the gpt-4o-2024-05-13 snapshot got in April and against OpenAI's own published floor of 'at least 6 months' for generally available models. The same day, GPT-5.5 left the ChatGPT, ChatGPT Work and Codex model pickers on every plan, five months after becoming the default. Fine-tuned models follow their base model out.
Read story →Claude Sonnet 4.5 has 61 days to live, and the replacement Anthropic names is 13% cheaper — not 33%
On 30 September 2026 Anthropic deprecated claude-sonnet-4-5-20250929 with retirement set for 30 November — 61 days, one day over the 60-day minimum its own policy promises, and the fifth consecutive deprecation to land within two days of that floor. The recommended replacement drops the list price from $3/$15 to $2/$10, but Sonnet 5.5 runs a tokenizer that produces about 30% more tokens for the same text. Net effective saving: about 13%.
Read story →Claude Sonnet 5.5 costs exactly what Sonnet 5 cost — and breaks five things on the way in, plus a sixth that raises no error
Anthropic shipped Claude Sonnet 5.5 on 28 September 2026 at $2/$10 per million tokens, identical to Sonnet 5, with a one-line model ID swap as the headline migration. The docs list five breaking changes behind that line — disabled thinking, forced tool use, thinking-block binding, the old computer use tool, and advisor pairings — and a sixth that changes the response shape without failing any request. The free upgrade has a migration bill.
Read story →OpenAI fixed a vision bug in GPT-6 Sol and Luna three days after launch — and neither model has a dated snapshot to tell the two versions apart
On 25 September 2026 OpenAI's changelog recorded a fix for 'a bug in image encoding that degraded image understanding' in GPT-6 Sol and GPT-6 Luna, released 22 September. Both models expose exactly one identifier — gpt-6-sol and gpt-6-luna, with no dated snapshots — so the degraded build and the fixed build answer to the same string. Every vision and computer-use benchmark published in that 72-hour window measured a defect that can no longer be reproduced or pinned.
Read story →OpenAI's oldest API surface runs out of models on Monday — and its own docs disagree about when your legacy fine-tunes die
On 28 September 2026 OpenAI shuts down gpt-3.5-turbo-instruct, davinci-002, babbage-002 and gpt-3.5-turbo-1106. The first three are the only models the legacy /v1/completions endpoint serves, so the endpoint does not get a replacement — it gets zero inhabitants. The deprecation table maps all four onto gpt-5.6-terra, a reasoning model on a different API surface at six times the output price, with no echo, no suffix, no best_of and no raw log-probabilities. And OpenAI's stated rule for fine-tunes contradicts its own shutdown date by 25 days.
Read story →OpenAI halved the price of GPT-6 Sol — and doubled the premium on its own flagship without touching Astra's price
OpenAI shipped GPT-6 Sol at $2/$10 and GPT-6 Luna at $0.10/$0.50 on 22 September 2026, a flat 50% cut against the GPT-5.6 tier. Astra did not move. Nineteen days ago Astra cost 2.5x Sol on every line item and OpenAI defended that with price-per-task; today it costs exactly 5x, and on OpenAI's own automation chart Astra at low effort scores below Sol at xhigh. Plus the effort-default gap every headline number in this launch is measured through.
Read story →Claude Opus 5.5 is 20% cheaper on the rate card and 40% cheaper in the press release — the gap is a default setting
Anthropic released Claude Opus 5.5 on 22 September 2026 at $4 input and $20 output per million tokens, down from Opus 5's $5/$25, with cache reads cut from $0.50 to $0.20. The headline claim is 40% cheaper to run. The rate card only accounts for about half of that; the rest comes from a default effort level that dropped from high to medium. Meanwhile cyber-flagged requests fall back to Opus 4.8 and bio-flagged ones to Opus 5 — both billed at $5/$25, more per token than the model you selected.
Read story →OpenAI's Assistants API shuts down today — and the next five shutdowns all hand work back to you
The Assistants API sunsets on 26 August 2026, exactly twelve months after notice. Five more OpenAI shutdowns land before 20 January 2027: legacy GPT snapshots on 23 October, Agent Builder and reusable Prompts on 30 November, GPT-5 and o3 snapshots on 11 December, legacy audio and realtime models on 20 January. The retirements are ordinary. The direction is not — every one of them moves state, hosting or tooling from OpenAI's servers onto yours.
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