LatestChatGPT & OpenAI
ChatGPT Student Discount 2026: Who Gets 4 Free Months of Plus
Eligible U.S. college students get four free months of ChatGPT Plus, then $20 a month. It includes GPT-6 Astra in ChatGPT Work and Codex, but not ChatGPT Pro.
9 min
Built for real engineering decisions
AI Model & API Guides
Source-linked guidance for AI models, API integration, and developer workflows—turning fast-changing prices, quotas, capabilities, and limits into decisions you can verify.
- Primary sources first
- Reproducible steps and failure boundaries
- Volatile facts carry review dates
- 555 articles
- 6 languages
- 12 topics
- Updated Oct 30, 2026
Claude Code
Claude Code 403 "Your Account Can't Receive Replies": Next Step
It's an Anthropic identity check, not a bug; retries won't clear it. Verify at portal.anthropic.com if you're in a supported country with a physical photo ID.
10 min
Troubleshooting
Codex Browser Disabled Even When Enabled: 2 Messages, 2 Fixes
Browser on but Codex says it is disabled? Fully quit and reopen the ChatGPT app, continue in a new chat, then check Work preferences → Local browser use.
14 min
API Pricing & Plans
DeepSeek Search API Pricing: $0.75/1K and Real Cost per Search
DeepSeek Search and Fetch: $0.75 per 1,000 successful requests, empty results free. Claude Code and Codex searches are billed from Oct 31, 2026, 16:00 UTC.
14 min
Model Comparisons
Gemini 4 Carbon vs Gemini 4 Argon: Slower Start, Faster Agents
Gemini 4 Carbon beats Argon 59.4 to 50.4 on AA's index but ties on SaaS automation. It's twice as slow to start a reply, yet finishes coding-agent tasks faster.
15 min
Claude Code
GLM-5.3-Flash in Claude Code: Setup That Actually Runs Flash
Point Claude Code at Z.ai's Coding Plan endpoint and put glm-5.3-flash[1m] in the Opus slot, which runs the main session. Effort defaults to high, not max.
16 min
Developer Tools & Agents
Codex Weekly Limit Reset: Find Your Time or Reset Now
Codex has no fixed reset day. Tibo's 28-day campaign has brought four global resets as of October 20, 2026; Settings → Usage shows whether one reached you.
22 min
AI Image Generation
Qwen Image 3.0 in ComfyUI: No Download, Setup, and Cost per Image
There are no Qwen Image 3.0 weights to download. ComfyUI runs it through two paid Partner Nodes: $0.0429 per standard image, Pro $0.0572 or $0.10725 by size.
17 min
Troubleshooting
GPT-6.1 Terra Not Showing in Codex With CC Switch: Fix by Mode
In CC Switch Routing mode, Codex gets an empty model list and shows its bundled one, which has GPT-6.1 Terra only from 0.165.0. Go back to Direct and restart.
12 min
API Pricing & Plans
Gemini 4 Carbon Release Date: Cyber Defenders Only for Now
Google announced Gemini 4 Carbon on October 28, 2026, but only Fairwind cyber defenders can use it. No public API or app date yet; build on Argon meanwhile.
11 min
Claude Code
Gemini 4 Carbon vs Opus 5.5: Opus Still Wins Coding Agents
Gemini 4 Carbon edges Claude Opus 5.5 on AA's index, 59.4 to 58.4, but Opus still leads coding agents and office work, and it is the one you can call today.
16 min
API Guides
Gemini "Requests ending with a model turn are not supported" Fix
Gemini 3.6 Flash and later, including Gemini 4 Argon, reject any request whose last turn is model (assistant). End contents on a user turn to fix the 400.
11 min
API Pricing & Plans
GPT Image 2 API Pricing: Cost per Image, Batch, and $0.03 Calls
GPT Image 2 costs about $0.005 to $0.43 per image in output on OpenAI's API, set by size and quality. Batch halves it, and ChatGPT has no per-image price.
12 min
AI Image Generation
Cheapest Real 4K GPT Image 2 / 2.5 API: $0.03 Native, Tested
As of October 29, 2026, $0.03 per image on LaoZhang API is the lowest price found for native 4K GPT Image 2 and 2.5, at every quality tier, edits included.
10 min
AI Image Generation
Nano Banana Pro 4K: Exact Sizes, $0.24 Cost and Watermark Rules
Nano Banana Pro gives 4K only when you ask for it: 16:9 is 5504x3072. Google charges $0.24 per 4K image, $0.12 on Batch; LaoZhang API $0.09 at any size.
24 min
AI Image Generation
How Much Is Nano Banana Pro? API, Plan, and Usable-Image Cost
Nano Banana Pro is $0.134 per 1K/2K image and $0.24 at 4K on Google's API; Google AI Pro is $19.99 a month with no API. LaoZhang API: $0.09 a call at any size.
17 min
Model Comparisons
Claude Haiku 5.5 vs GPT-6 Luna: Same Price, 2.2x Cost per Task
Claude Haiku 5.5 and GPT-6 Luna share $0.10/$0.50 rates under 100K tokens, yet Haiku cost 2.2x more per task at default effort and reprices 5x above 100K.
20 min
Claude Code
Claude Haiku 5.5 vs Sonnet 5.5: When the 20x Price Gap Pays Off
Claude Haiku 5.5 costs 1/20 of Sonnet 5.5 per input and output token but trails it on agentic coding. Move checkable work to Haiku; keep agents on Sonnet.
16 min
Model Comparisons
Claude Opus 5.5 vs GPT-6.1 Terra: 1/9 the Cost Only at Max
GPT-6.1 Terra's 1/9 cost claim is max vs max. At equal AA scores, Opus 5.5 high costs 3.6x Terra max per task, and English input bills about 5.8x.
16 min
Model Comparisons
Claude Opus 5.5 vs GPT-6.1 Sol and GPT-6 Sol: When Opus Pays Off
Against GPT-6.1 Sol, Opus 5.5 costs exactly 2x per token under 272K input and stays pricier above. Opus scores higher; pay only where it passes more tasks.
15 min
Claude Code
Claude Sonnet 5.5 vs Sonnet 5: Cost by Effort and What Breaks
Sonnet 5.5 keeps Sonnet 5's $2/$10 token prices. In Artificial Analysis's October 5 tests it cost less per task from low to xhigh and about 51% more at max.
19 min
Model Comparisons
Claude Sonnet 5.5 vs GPT-6.1 Sol: Same Price, 2–8x Cost per Task
Same $2/$10 list price, but Sonnet 5.5 costs 2.2–7.9x GPT-6.1 Sol per AA task. Start on Sol; use Sonnet for terminal agents and prompts over 272K tokens.
20 min
Model Comparisons
Claude Sonnet 5.5 vs GPT-6 Astra: When the Cheaper Model Wins
GPT-6 Astra outscores Sonnet 5.5 at every effort level on Artificial Analysis' index. Sonnet is cheaper per task up to high, faster, and wins above 272K input.
18 min
Model Comparisons
Claude Sonnet 5.5 vs Opus 5.5: When Half the Price Really Saves
Sonnet 5.5 costs half as much per token and suits well-scoped work at low or medium effort. At max it costs as much per task as Opus 5.5 and scores lower.
19 min