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

541 articles
6 languages
12 topics
Updated Oct 27, 2026

Gemini 4 Argon Retrying 1/9 in Antigravity: a large file edit goes silent for 60 s, nine attempts follow, and the fix is line ranges of up to 100 lines

LatestTroubleshooting

Gemini 4 Argon "Retrying (1/9)": Why Large Edits Fail at 60s

Gemini 4 Argon's "Model unavailable, retrying (attempt 1/9)" in Antigravity usually means a big file edit sat silent for 60 s. Stop and edit by line range.

Oct 27, 202614 min

ChatGPT access troubleshooting across service status, browser checks, managed networks, location and account issues.

ChatGPT & OpenAI

ChatGPT Unblocked at School, Work or Abroad: Find the Block

Start with the exact error and OpenAI's status page. Then check whether the problem follows a browser, network or account; school and work restrictions need the responsible administrator.

Oct 27, 202612 min

Gemini 4 Argon usage limits: a matrix of the Gemini app, AI Mode, Antigravity, AI Studio plan quota and the paid API across Free or Plus, Pro and Ultra

Gemini & Google AI

Gemini 4 Argon Usage Limits: Pro vs Ultra, Resets, API Credits

Google AI Pro and Ultra both include Gemini 4 Argon in AI Studio, with higher daily quota on Ultra. Gemini app limits use five-hour and weekly windows; API billing is separate.

Oct 27, 202616 min

Several Gemini API keys share one project's RPM, TPM, and RPD limits.

API Guides

Gemini API Free Tier 2026: Limits, Free Models, and Free API Keys

Gemini API keys are free, but free inference requires an eligible project, model and feature. Check live limits, grounding exceptions, 403s and data-use rules.

Oct 27, 202621 min

GPT-6.1 Terra at $1 / $5 vs GPT-6.1 Sol at $2 / $10 per 1M tokens: half the price per token, not always cheaper per task

Model Comparisons

GPT-6.1 Terra vs GPT-6.1 Sol: Half the Price, Not Always Cheaper

Terra's API and Codex rates are half of Sol's, and it ran small Codex tasks twice as fast. At max effort, though, Terra costs more per task than Sol at medium.

Oct 27, 202618 min

Claude vs OpenAI API pricing: Sol matches Sonnet 5 and Astra matches Fable 5.1, Claude costs less past 272K input and on top-tier cache hits, OpenAI's Luna costs less at the budget tier

API Pricing & Plans

Claude API vs OpenAI API Pricing: When Each One Costs Less

As of September 26, 2026, GPT-6 Sol matches Sonnet 5 and Astra matches Fable 5.1 on list price. Prompts over 272K favor Claude; Luna costs a tenth of Haiku 4.5.

Oct 26, 202611 min

Decision map from the August 2026 lineup that matches four workload types to Claude Haiku 4.5, Sonnet 5, Opus 5, and Fable 5

Claude & Anthropic

Claude Haiku vs Sonnet vs Opus vs Fable: Models Compared

Start with Sonnet 5.5 in the Claude apps and Opus 5.5 in the API, move narrow high-volume work to Haiku 5.5, and try Fable 5.1 only when Opus falls short.

Oct 26, 202618 min

Claude Sonnet 5.5 vs Sonnet 5: same $2/$10 token price, $1.12 vs $1.79 per task at high effort and $7.67 vs $5.09 at max

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. On Artificial Analysis tests it costs less per task from low to xhigh effort and about 51% more at max.

Oct 26, 202618 min

Claude Sonnet 5.5 vs Gemini 3.8 Flash: Flash is 2.67x cheaper per token but cost 2.42x as much over 11 identical test calls

Model Comparisons

Claude Sonnet 5.5 vs Gemini 3.8 Flash: Cost per Task, Tested

Gemini 3.8 Flash is 2.67x cheaper per token, yet on 11 identical calls at high effort on October 26, 2026 it cost 2.42x as much as Claude Sonnet 5.5.

Oct 26, 202618 min

Claude Sonnet 5.5 vs GPT-6 Astra cover comparing list prices of $2 and $10 against $10 and $50 per million tokens, with max-effort scores of 56 and 53 and costs per task of $7.60 and $3.26

Model Comparisons

Claude Sonnet 5.5 vs GPT-6 Astra: When the Cheaper Model Wins

Sonnet 5.5 beats GPT-6 Astra only at max effort, at a higher cost per task. Astra leads from low to high, ties at xhigh; Sonnet's low rates win on long inputs.

Oct 26, 202616 min

Claude Sonnet 5.5 vs GPT-6 Luna: 20x per token, 5–8x per task at similar scores, 50x at API defaults

Model Comparisons

Claude Sonnet 5.5 vs GPT-6 Luna: 20x per Token, 5–50x per Task

Sonnet 5.5 costs 20x GPT-6 Luna per token and 5–50x per benchmark task. Luna fits volume and long documents; Sonnet fits agentic coding and scores above 38.

Oct 26, 202618 min

Workload decision board comparing GPT-6 Astra and Claude Fable 5.1 across access, API cost, data rules, and acceptance testing

Model Comparisons

GPT-6 Astra vs Claude Fable 5.1: Same Price, 1.5x the Tokens

Both list at $10/$50 per million tokens, but on October 26, 2026 Fable 5.1 counted 1.45x Astra's tokens for English and cost 1.5–1.6x on tasks both passed.

Oct 26, 202617 min

GPT-6.1 Sol pricing by API route: OpenAI direct discounts cache reads while laozhang.ai bills cached input in full, with low effort and Responses API tool migration reminders

API Pricing & Plans

GPT-6.1 Sol: Pricing, Access, and What Breaks When You Switch

GPT-6.1 Sol keeps GPT-6 Sol's $2/$10 rates but halves cached input to $0.10. Requests using none effort or Chat Completions tools must change.

Oct 26, 202618 min

GPT-6.1 Sol feels slow: the silent wait before the answer grows from 12.8 to 60.5 seconds between low and xhigh effort, while streaming stays near GPT-6 Sol pace

Troubleshooting

GPT-6.1 Sol Slow in Codex or API? Causes and Tested Speed Fixes

GPT-6.1 Sol's launch-week overload is over; most of today's wait is thinking before the first word. Lower the effort first, then try Fast.

Oct 26, 202616 min

GPT-6.1 Sol vs GPT-6 Astra cover: GPT-6 Sol and GPT-6.1 Sol both at $2 input and $10 output per 1M tokens, Astra at $10 and $50

Model Comparisons

GPT-6.1 Sol vs GPT-6 Astra vs GPT-6 Sol: When Astra Is Worth It

Move gpt-6-sol traffic to GPT-6.1 Sol: same price, higher scores at every effort. Run it one level higher to match Astra for 3–5x less; Astra max has no equal.

Oct 26, 202617 min

GPT-6 Astra API pricing overview showing context bands, token categories, and the steps for calculating a request's cost.

API Pricing & Plans

GPT-6 Astra API Pricing: $10/$50 per 1M Tokens, Caching Costs

GPT-6 Astra costs $10 input and $50 output per 1M tokens up to 272K. Caching is on by default; writes cost $12.50 (30 min) or $25 (12 h) as of October 26, 2026.

Oct 26, 202614 min

Four model cards: Sol, Luna, and Astra in the GPT-6 lineup alongside GPT-5.6 Terra

Model Comparisons

GPT-6 Sol vs Terra vs Luna vs Astra: Which Model Should You Use?

The current Sol is GPT-6.1 Sol; Luna and Astra are GPT-6, and Terra is GPT-5.6. Compare direct-API rates, then test cost per accepted task before switching.

Oct 26, 202610 min

Kimi K3.1 Pro at $2/$10 and MiniMax M3.1 Flash at $0.15/$0.60 per million tokens, about 14 times the cost per request

Model Comparisons

Kimi K3.1 Pro vs MiniMax M3.1 Flash: Is 14× the Cost Worth It?

Kimi K3.1 Pro costs about 14× MiniMax M3.1 Flash per request. Flash holds up on routine, checkable work; K3.1 Pro earns its price on agents and facts.

Oct 26, 202617 min

Watercolor illustration of a developer at a laptop sending a prompt to a ModelScope cloud, with an API key, an account-ready shield, and a framed golden cat as the generated image

API Guides

Qwen Image 2.1 Free API: ModelScope Token, Daily Cap, and Code

ModelScope runs a free Qwen-Image-2.1 API once you bind a real-name-verified Alibaba Cloud account. At 1 credit per call, that tops out near 250 calls a day.

Oct 26, 202612 min

Qwen Image 2.1 Turbo API on Alibaba Cloud Model Studio: $0.016 per image in Singapore, $0.014133 in Global regions, 120 RPM per account

API Guides

Qwen Image 2.1 Turbo API: Python Code and $0.014–$0.016 Pricing

Turbo is live on Alibaba Cloud Model Studio at $0.016 per image in Singapore or $0.014133 in the Global regions, 120 RPM per account. Python code included.

Oct 26, 202614 min

DeepSeek V4.1 Flash vs GLM-5.3-Flash cost per AA task: $0.13 off-peak, $0.26 at DeepSeek peak, $0.28 for GLM

Model Comparisons

DeepSeek V4.1 Flash vs GLM-5.3-Flash: Which Is Cheaper, and When

Both list $0.15 per 1M input. Off-peak, DeepSeek V4.1 Flash wins on agent loops and short calls; at its weekday peak, GLM-5.3-Flash often costs less.

Oct 25, 202617 min

DeepSeek V4.1 Flash at $0.15/$0.60 per million tokens next to Kimi K3.1 Pro at $2/$10, with K3.1 Pro costing 9–28× as much per job

Model Comparisons

DeepSeek V4.1 vs Kimi K3.1: Flash vs Pro and a 9–28× Cost Gap

DeepSeek V4.1 is only Flash and Kimi K3.1 only Pro. In an October 25, 2026 test, both got the 3 graded tasks right; K3.1 Pro cost 12.8× as much, 3× slower.

Oct 25, 202617 min

Kimi K3.1 Pro vs Claude Opus 5.5: $2/$10 per million tokens against $4/$20, but $2.11 per task against $1.82 for Opus at high

Model Comparisons

Kimi K3.1 Pro vs Claude Opus 5.5: Half per Token, Not per Task

K3.1 Pro's $2/$10 is half of Opus 5.5's $4/$20 per token, yet at Kimi's default max effort a task can cost as much as Opus. Set effort before you switch.

Oct 25, 202619 min

Kimi K3.1 Pro and Gemini 4 Argon both at $2 input and $10 output per million tokens through November 30, 2026, with Argon at $4 and $20 from December 1

Model Comparisons

Kimi K3.1 Pro vs Gemini 4 Argon: Same Price Only Until Dec 1

Both list at $2/$10 per 1M tokens through November 30, 2026, then Argon doubles. K3.1 Pro leads terminal coding and long context; Argon leads factual recall.

Oct 25, 202617 min