Codersera Blog

Practical guides on remote hiring, AI engineering, mobile testing, and developer tooling.

Latest Stories — Page 2

AI Models

Claude Sonnet 5.5 vs Opus 5.5 (2026): Is Half the Price Enough?

Sonnet 5.5 costs half of Opus 5.5 per token and nearly matches it on benchmarks, but uses ~60% more output tokens — $7.67 vs $5.98 per task at max effort on Artificial Analysis v4.3.2. Benchmarks, a per-task cost worked example, and a task-by-task pick table.

· 11 min read
AI Agents

Grok Bot Complete Guide 2026: Pricing, Team Bots, Enterprise

Grok Bot is SpaceXAI's always-on agent on its own cloud computer. What it costs on Cursor and SuperGrok plans, which model runs it, Enterprise, Plaid finance, Team Bots, the dot.com redirect, Voice Transcribe 2.0, and what's confirmed about Grok 4.8 and Grok 5.

· 14 min read
AI Models

MiMo V2.6 Flash & 9B Distill: Benchmarks, Run Locally (2026)

MiMo-V2.6-Flash is Xiaomi's MIT-licensed 309B/15B-active MoE at $0.14/$0.28 per 1M tokens. The Distill-Qwen-9B runs on an 8 GB GPU. Specs, benchmarks, VRAM by quant, and Ollama / LM Studio / llama.cpp commands.

· 13 min read
AI Models

GPT-6.1 Sol Complete Guide (Oct 2026): Pricing, Ultrafast, Codex, API

GPT-6.1 Sol costs $2/$0.10/$10 per 1M tokens. Ultrafast went live Oct 8 at $12/$0.60/$60, 12h cache writes cost $5 per 1M, it is the Codex CLI default since 0.161.0, and it is in Google Cloud private preview. Benchmarks, Codex multipliers, cost math.

· 20 min read
AI Models

Grok 4.7 vs Grok 4.6: What Changed and Should You Upgrade?

Grok 4.7 vs Grok 4.6: same $2/$6 price and 500K context, a new larger base model, +17 points on Terminal-Bench, but ~2.25x the tokens per task. Specs, benchmark deltas, real cost per task, API migration, and the Grok 4.8 outlook.

· 13 min read
AI Models

Claude Opus 5.5 vs GPT-6 Sol: Benchmarks, Cost (2026)

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.

· 15 min read
AI Models

Claude Opus 5.5 Migration Guide: Every Breaking Change (2026)

Migrating from Claude Opus 5 to Opus 5.5: thinking can't be disabled, forced tool_choice returns 400, thinking blocks are bound to the conversation, computer_20251124 is rejected, and effort defaults to medium. Exact errors, before/after code, costs, and a rollback plan.

· 15 min read
AI Models

GPT-6 Sol and Luna: Complete Guide, Pricing and Benchmarks

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.

· 13 min read
AI Models

Meta Muse: The Complete Guide to Meta's AI Agent App (2026)

Meta Muse is Meta's personal AI agent app, launched 8 Sept 2026 on Muse Spark 1.3. What it does, how the Secure VM and Sentinel work, pricing, Muse for Mac, Muse Connectors, privacy, and how it compares with Claude Cowork and Gemini Spark.

· 13 min read
AI Models

Xiaomi MiMo-V2.6-Pro: Top Open-Weights Model (2026)

Xiaomi's MiMo-V2.6-Pro is the new top open-weight model: 1.02T/42B MoE, 1M context, MIT licence, AA Index 46, $0.435/$0.87 API. Specs, benchmarks, hardware, comparison with Kimi K3, Qwen 3.8 Max, DeepSeek V4.1 Flash and GLM-5.3.

· 15 min read
OpenAI

Why GPT-6 Astra Was Held Back: The Critical Cyber Finding

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.

· 11 min read
GPT-6 Astra

GPT-6 Astra vs GPT-5.6 Sol: Should You Upgrade?

GPT-6 Astra beats GPT-5.6 Sol by 5.7 points on Artificial Analysis's Intelligence Index v4.3.2 (52.67 vs 46.97 at max effort) and costs 64% more per task. But Sol is now deprecated on AA, and GPT-6.1 Sol reaches 51.83 for $0.72 a task.

· 19 min read
OpenAI

GPT-6 Astra: Complete Guide, Pricing and Benchmarks

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.

· 16 min read
OpenAI

GPT Astra vs Google Project Astra: Not the Same Thing

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.

· 8 min read
GPT-6

GPT-6 Astra Pricing: API Costs at $10/$50 per 1M

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.

· 15 min read
AI

Muse Spark 1.3 vs Claude Opus 5: Benchmarks & Cost (2026)

Muse Spark 1.3 sits 2.7 points behind Claude Opus 5 on Artificial Analysis Intelligence Index v4.3.2 at under a third of the cost per task - and both now carry a Terminal-Bench 4.0 number. A source-checked comparison.

· 17 min read