Compare AI models
| Specifications | ||
Context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider. | 400k | 200k |
| API pricingUSD per 1M tokens · lower wins | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | $1.75 | — |
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one. | $14.00 | — |
Cached input priceA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again. | $0.175 | — |
Cheapest inputLowest input rate across every provider on OpenRouter, the lab included. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | $1.75Azure | $1.10OpenAI |
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input. | $14.00Azure | $4.40OpenAI |
| $1,050OpenAI list price | $440OpenAI | |
| These models have no shared benchmark scores. | ||
BullshitBench v2Nonsense detection — Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | 24% | — |
SWE-Bench VerifiedCoding — Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 85% | — |
Next.js EvalsNext.js coding — Vercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. | 68% | — |
OSWorld-VerifiedAgentic computer use — Can the AI actually operate a computer — clicking, typing, and using real apps — to finish tasks on its own? Higher is better. | 64.7% | — |
threejsevalCommunity preference (Three.js) — Every model gets the same prompt — "the Eiffel Tower", "a glass fishbowl", "a robot arm picking toys into a box" — and builds a 3D scene in Three.js. Real people then see two scenes side by side, names hidden, and vote for the one they prefer. The votes become a chess-style Elo rating on threejseval.com, averaged across all the prompts. It measures whether the scene looks and moves right to a human eye, not whether the code passes a test. Higher is better. | 1171 | — |
| Overview | ||
| Company | OpenAI | OpenAI |
| Release date | Feb 5 2026 | Jan 31 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
GPT-5.3-CodexvsClaude Haiku 5.5o3-mini-highvsClaude Haiku 5.5GPT-5.3-CodexvsGemini 4 Argono3-mini-highvsGemini 4 ArgonGPT-5.3-CodexvsMuse Spark Openo3-mini-highvsMuse Spark OpenGPT-5.3-CodexvsGrok 4.7o3-mini-highvsGrok 4.7GPT-5.3-CodexvsDeepSeek-V4.1-Flash-1017o3-mini-highvsDeepSeek-V4.1-Flash-1017GPT-5.3-CodexvsMistral Large 4o3-mini-highvsMistral Large 4Frequently asked questions
GPT-5.3-Codex and o3-mini-high don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Only GPT-5.3-Codex has a verified first-party API price: $1.75 per million input tokens and $14.00 per million output tokens. No pay-as-you-go API rate is tracked for o3-mini-high. o3-mini-high shipped 370 days before GPT-5.3-Codex, so benchmark comparisons should account for the intervening progress.
Context windows are 400k (GPT-5.3-Codex) vs 200k (o3-mini-high).
Direct benchmark comparisons are unavailable — GPT-5.3-Codex and o3-mini-high don't publish scores on any of the same benchmarks.