OpenAI

Claude Opus 5.5 and GPT-6 Sol launched 90 minutes apart on 22 Sept 2026. Opus 5.5 wins on benchmarks; Sol costs half per token. Pricing, cost per task, shared benchmarks, Claude Code vs Codex, and which to pick.

GPT-6 Sol ($2/$10) and GPT-6 Luna ($0.10/$0.50) launched 22 Sept 2026 at half the price of GPT-5.6. Specs, model IDs, pricing, OpenAI vs independent benchmarks, availability, API code, and Sol vs Astra.

OpenAI classified GPT-6 Astra as the first model to meet the Critical cybersecurity threshold under its Preparedness Framework. What the system card actually documents, what safeguards shipped, and what the June 2026 executive order really says.

OpenAI released GPT-6 Astra on 3 September 2026. Verified specification table, OpenAI-reported vs independently measured benchmarks, the 272K pricing cliff, staged rollout, and the API migration gotchas.

Two different products share the name Astra. GPT-6 Astra is OpenAI's new flagship model; Google Project Astra is a DeepMind research prototype whose features ship inside Gemini Live. Here is the side-by-side.

GPT-6 Astra costs $10/1M input and $50/1M output, but crossing 272K tokens reprices the entire request. Verified rates, the long-context cliff, and worked monthly costs.

A neutral, sourced deep-dive on GPT-5.6 Sol Ultra — its multi-agent mode, benchmarks, cost, and how it compares with Claude Fable 5 and the frontier at peak.

A neutral, source-led comparison of OpenAI GPT-5.6 (Sol, Terra, Luna) and Anthropic Claude Fable 5: pricing, intelligence and coding benchmarks, cost per task, and which to use.

A practical GPT-5.6 vs GPT-5.5 comparison: what actually changed across the new Sol/Terra/Luna tiers, pricing, reasoning modes, benchmarks, and a clear decision guide on whether to upgrade or stay put.

OpenAI's GPT-5.6 family — Sol, Terra, Luna — tiers, current pricing after the July 30 cuts, Ultrafast and Cyber, benchmarks, and how to choose.

Yes, gpt-3.5-turbo is still available — until October 23, 2026 (instruct: Sept 28). Exact shutdown dates, and why OpenAI points migrations at GPT-5.6 Terra.

OpenAI's GPT-5.5 Cyber ships gated under the Daybreak program. What 'trusted access' means, the CyberGym-vs-Mythos-5 benchmark claim (and its caveats), and what defenders and developers should take from it.

OpenAI's flagship versus Z.ai's freshest open-weights challenger. GPT-5.5 holds frontier coding benchmarks; GLM 5.2 ships a 1M window and self-hostable weights. Where each actually wins for engineering teams.

GPT-5.5 Instant replaced GPT-5.3 as ChatGPT's default, Codex shipped Goal Mode and richer MCP, and a GPT-5.6 entry briefly surfaced in OpenAI's Codex logs. Here is the complete May 2026 OpenAI changelog and what it means for developers.

GPT-5.6 (Sol, Terra, Luna) hit general availability on July 9, 2026. Release timeline, the July 30 price cuts, Ultrafast, Cyber, and what to run now.

A neutral 2026 comparison of Claude Code and OpenAI Codex: SWE-bench scores, Terminal-Bench, real pricing, token efficiency, sandboxing, and a clear decision framework for engineering teams.

DeepSeek V4 launched the same week as GPT-5.5 and GPT-5.5 Pro. We break down the benchmarks, pricing, 1M-context engineering, coding wins, and which model your team should actually deploy.

The rapid evolution of large language models (LLMs) has led to fierce competition between open-source initiatives and proprietary giants. Two of the most advanced models in 2025 are DeepSeek R1-0528, an open-source model from DeepSeek AI, and OpenAI’s O3, a closed-source flagship. Both models are at the cutting edge

Quick answer. o3 remains a strong reasoning-tier coder for math-heavy work but is now mid-tier in 2026 — GPT-5 (74.9% SWE-bench Verified) and GPT-5.5 (58.6% SWE-Bench Pro) clearly lead. Gemini 2.5 is best for long-context refactors; o4-mini is the cheap, fast pick for boilerplate. Reach for o3

The artificial intelligence space continues to evolve rapidly, and two of the most powerful contenders in 2025 are Meta’s Llama 4 and OpenAI’s GPT-4.5. Each model brings unique capabilities and innovations, catering to a broad spectrum of use cases—from enterprise automation to creative content generation. This

Artificial Intelligence (AI) has witnessed exponential advancements, with Microsoft and OpenAI at the forefront of large language model (LLM) research. Microsoft's Phi-4 and OpenAI's GPT-4.5 exemplify two paradigms of AI development: efficiency-focused compact architectures versus expansive, multimodal behemoths. Architectural Foundations of Microsoft Phi-4 Microsoft'