#gpt-5-5

On June 9, 2026, ChatGPT's GPT-5.5 personalization reached Free and Go tiers, drawing on past chats, files, and Gmail. What agencies must do about data policy.

Claude Fable 5 leads the benchmarks; GPT-5.5 costs half as much and owns Codex. We compare coding, knowledge work, long context, and cost to find the fit.

MiniMax M3 lands at 5-17x lower cost, but Opus 4.8 leads SWE-bench Pro and GPT-5.5 wins Terminal-Bench. A full three-way agentic coding routing matrix.

We compare Claude Opus 4.8 and GPT-5.5 on coding, agents, reasoning, and real cost — including where GPT-5.5 still wins and which model fits which job.

Agentic coding head-to-head: Gemini 3.5 Flash vs GPT-5.5 vs Opus 4.7. MCP Atlas, SWE-Bench Pro, Terminal-Bench, plus Antigravity 2.0 launch context.

Migrate GPT-5.2 to 5.5 — reasoning-effort behavior change, tool-call schema diff, cost-curve impact, structured outputs, and a phased rollout plan.

MoE choices powering 2026 frontier models compared — total vs active params, routing strategies, sparsity ratios, and the downstream cost implications.

Cross-modal benchmark scores — image understanding, video, OCR, ASR, code-with-vision — across GPT-5.5, Gemini 3, Claude 4.7, Qwen 3.5 Omni. 80+ data cells.

Updated NIAH-2 results across 1M-context models — single-needle, multi-needle, and reasoning-over-context. Where models silently fail above 200K tokens.

Head-to-head: GPT-5.5 and Claude Opus 4.7 on agentic coding, computer use, 1M context, pricing, and the right model for each production workload.

OpenAI's GPT-5.5 ships April 23, 2026 with 1M context, Thinking and Pro variants, 82.7% Terminal-Bench, and same latency as GPT-5.4. Pricing inside.

We measured low/medium/high reasoning effort across 5 frontier models on math, code, and analysis. Quality lift, latency tax, and cost-per-correct-answer data.

Cross-model hallucination rates on factual recall, citation accuracy, and code reference. 5,000 prompts tested across 5 frontier models with confidence bands.

MCP tool-call success across 12 task types — search, file ops, data, calendar, email. Pass-rate, retry-rate, and cost-to-completion for 5 frontier AI models.

Preview of Q2 2026 AI model releases. DeepSeek V4 at ~1T parameters, GPT-5.5 Spud with pretraining done, and Grok 5 expected by mid-2026. Timeline and specs.