SHELFCRITTER AI Digest

MODEL

GPT-5.5

modeltopic-note

Overview

GPT-5.5 is OpenAI’s April 2026 release following GPT-5.4, introducing doubled per-token pricing while maintaining inference latency parity. The model demonstrates 88.7% on SWE-Bench Verified, a 60% reduction in hallucinations over GPT-5.4, and is positioned as OpenAI’s primary response to Anthropic’s Claude Opus 4.7 lead on coding benchmarks. Released across ChatGPT Plus, Pro, Business, and Enterprise tiers with API access, GPT-5.5 is accompanied by a GPT-5.5 Pro variant gated behind the Pro subscription tier.

Timeline

  • 2026-04-24-AI-Digest — OpenAI ships GPT-5.5 with per-token pricing doubled to $5/1M input and $30/1M output tokens (vs GPT-5.4’s $2.50/1M and $15/1M). GPT-5.5 Pro at $30/1M input and $180/1M output. Model matches GPT-5.4 latency while achieving 88.7% SWE-Bench Verified and 60% hallucination reduction. Disclosed $25B annualized run rate. IPO chatter resurfaces with late-2026 window “actively being explored” placing OpenAI in same corridor as Anthropic ($380–500B valuation target).

Key Developments

  1. Pricing Doubling: First generational upgrade where OpenAI raised per-token prices rather than holding flat; critical test of whether OpenAI can raise ASPs toward Anthropic’s per-token-profitable unit economics without demand compression.

  2. Latency Parity + Capability Gain: Inference speed matches GPT-5.4 while advancing performance, addressing the traditional capability-vs-efficiency tradeoff.

  3. Benchmark Positioning: 88.7% SWE-Bench Verified places GPT-5.5 close to Anthropic’s Claude Opus 4.7 (87.6%) — a deliberately narrow gap rather than a leading position, consistent with OpenAI’s post-April-17 competitive posture.

  4. Commercial Signal: $25B ARR disclosure and doubled pricing structure are the “two legible proofs” for OpenAI’s Q2 2026 story — demonstrating both ASP elasticity and unit-economics movement ahead of IPO window.