LatestModel 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
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
- 545 articles
- 6 languages
- 12 topics
- Updated Oct 28, 2026
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
API Guides
Gemini 4 Argon API finish_reason: CONTINUATION and Empty Replies
Gemini 4 Argon: resend with continuationToken on CONTINUATION, raise the budget when MAX_TOKENS has no text. OpenAI-compatible endpoints can't continue.
13 min
Model Comparisons
Gemini 4 Argon vs Claude Opus 5.5 vs GPT-6.1 Sol: Cost and Access
Gemini 4 Argon opened to paid API users on October 13 at $2/$10, doubling December 1. At matched effort it costs more per task than Opus 5.5 and 6.5x GPT-6.1 Sol.
18 min
Model Comparisons
Gemini 4 Argon vs 3.8 Flash: Cost per Task and When to Switch
Gemini 4 Argon lists at 2.67x 3.8 Flash per token, but on five same-prompt calls it cost 1.57x as much through Nov 30, 2026, and 3.15x in December.
18 min
Model Comparisons
Fable 5.5 vs Gemini 4 vs GPT-6.1: Which Can You Use Today?
As of October 14, 2026, you can call GPT-6.1 Sol and Gemini 4 Argon, available since October 13. Fable 5.5 is unannounced, and GPT-6.1 Astra was shelved.
15 min
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.
18 min
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 at the same price. Astra leads it by 2–8 points at equal effort; Sol max ties Astra high for 2.6x less per task.
20 min
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 xhigh effort, though, it costs more per task than Sol at medium.
19 min
Model Comparisons
GPT-6.1 Terra vs GPT-6 Luna: 10× per Token, 2.7–6.3× per Task
GPT-6.1 Terra costs 10× GPT-6 Luna per token. On 12 tasks tested October 28, 2026, it cost 2.7–6.3× as much per passed task and passed 15–16 of 16 to Luna's 12.
15 min
Model Comparisons
GPT-6 Sol vs Terra vs Luna vs Astra: Which Model Should You Use?
GPT-6 now has a Terra: GPT-6.1 Terra, released October 26, 2026, costs half of GPT-6.1 Sol per token and about 10 times Luna. Pick by workload, then test.
16 min
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.
20 min
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; Argon leads overall and on factual recall.
17 min
Model Comparisons
Kimi K3.1 Pro vs GPT-6.1 Sol: Same $2/$10, 3× the Cost per Task
Both list at $2/$10 per million tokens, but Artificial Analysis puts K3.1 Pro at $3.68 per task against $1.27 for Sol at max, which also scores higher.
21 min
Model Comparisons
Muse Wonder vs Opus 5.5: Benchmarks and Cost at the Same $4/$20
At max effort on Artificial Analysis, Claude Opus 5.5 scores 58 to Muse Wonder's 43, and Wonder costs 31% less per task. Wonder Full has no API.
20 min
Troubleshooting
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.
14 min
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.
12 min
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.
16 min