November 2025 was extremely packed with new AI model releases, as GPT-5.1, Grok 4.1, Gemini 3 Pro, Claude Opus 4.5 all released within just 6 days of each other — if you’re looking for the best AI model for coding or writing, now’s the time.
We'll explain what each of these models is, what they're best at, and compare all four based on benchmarks, features, and pricing.
By the end, you'll know which AI model is best for your specific use case.
PT-5.1 is OpenAI's latest flagship model, released on November 12, 2025. It's mid-lifecycle refresh of GPT-5 that adds a warmer personality to the chatbot.
There are two variants of GPT-5.1:
GPT-5.1 can switch between different versions based on the context and type of question, so you don't have to choose which one to use.
GPT 5.1 is the model behind ChatGPT — the most popular AI chatbot by far, and the fastest growing company in history. OpenAI is facing strong competition. The latest releases from competitors have been especially interesting. Is this still the best AI model, or has GPT reached its limits?
To answer this question, we need to understand other AI models from this comparison.
Also read: When is GPT-6 release date?
Grok 4.1 is xAI's most powerful model, released on November 17, 2025. The model comes in two configurations:
xAI also offers Grok 4 Heavy ($300/month tier) that uses multi-agent collaboration for complex problems, and Grok 4 Fast for cost-efficient reasoning with a 2M token context window.
Also read: Grok vs ChatGPT
Launched on November 18, 2025, Gemini 3 Pro is Google's most intelligent model. It features native multimodal understanding and a massive 1 million-token context window. This is the first Google model to claim the #1 spot on Artificial Analysis.
At the time of writing, two Gemini 3 models were announced:
If past releases are anything to go by, Google will likely also release Gemini 3 Flash, a faster model optimized for everyday tasks.
Gemini integrates directly into Google's ecosystem, including Search, Workspace, and developer platforms like Vertex AI.
Claude Opus 4.5 is Anthropic's most intelligent AI model, as of November/December 2025. It's mainly designed for coding and agentic tasks, though like most advanced models it also excels at math.
This is the most capable model Anthropic has ever released, excelling at everything from deep research to working with slides and spreadsheets.
According to Anthropic, Opus 4.5 is a better coding model than most humans. When the company's team tested Opus 4.5 on an internal performance engineering exam, it scored higher than any human candidate ever has.
Benchmarks give us concrete data to compare raw performance across models. Here's how GPT-5.1, Grok 4.1, Gemini 3 Pro, and Claude Opus 4.5 stack up in different benchmarks.
Pay close attention to the SWE-bench Verified — it measures how well models can resolve real GitHub issues — this is the best benchmark for real-world performance, and Claude Opus 4.5 is the only model here that goes above 80%.
We don’t have data for Claude Opus 4.5, but comparing the models, they are all fairly close, with Gemini 3 Pro performing just a little better than GPT-5.1 — it’s 0.4 percentage points difference.
Claude Opus 4.5
It topped the industry on SWE-bench Verified with 80.9%, beating Gemini 3 Pro (76.2%), GPT-5.1 (76.3%), and Grok 4.1 (74.9%) — this is the most important benchmark to track, as it measures performance in real-world tasks.
According to Antropich, Opus 4.5 is very good at writing and debugging code, is proficient in multiple languages, and can understand large codebases. Much of this comes down to smart context window optimization — instead of loading the entire code base at once Claude can reason about where to look and load specific sections of the codebase into memory, so to speak.
In terms of real-world performance, it’s on par with a developer. When the company's internal team tested it on an internal performance engineering exam, it scored higher than any human candidate ever has.
Meanwhile, Terminal-bench 2.0 measures command-line task execution, and Claude Opus 4.5 scored 59.3%, which is high — this makes it useful for developers who need an AI that can work directly with development tools and workflows.
Which AI is in second place? Gemini 3 Pro — it also performs well on WebDev Arena (1487 Elo) and Terminal-bench 2.0 (54.2%). This is the model for you if you enjoy vibe-coding.
Google took vibe coding to the next level with Antigravity — an IDE created around vibe coding at core. You can create complete AI-powered applications from simple prompts.
Gemini 3 Pro
Gemini 3 Pro scored 95.0% on AIME 2025, edging out GPT-5.1 (94.6%) and Grok 4.1 (88%) on high school math competition problems.
AIME 2025 measures performance on challenging mathematical reasoning tasks that typically only top high school students can solve. Both Gemini 3 Pro and GPT-5.1 demonstrate near-human expert performance on these problems.
When Deep Think mode is enabled, Gemini's math performance improves even further. The model spends more time reasoning through complex problems, leading to more accurate solutions on difficult mathematical tasks.
GPT-5.1 is a close second with 94.6% on AIME 2025. The difference between the two models is minimal for most practical math applications. Pick whichever one you prefer.
Nano Banana 2
Nano Banana 2 is the best AI image generation model in 2025. Many say it's the best AI image generator in the world — and it’s probably true. Nano Banana 2 is Google's image-generation component that works alongside Gemini 3.
What are the disadvantages? It costs more and is slower than other models. That's why Nano Banana 2 is also called Nano Banana Pro. It wasn't a replacement for the original model. Instead, it was released as a more advanced, premium version.
Other notable image generators include:
What about ChatGPT? GPT Image 1 is OpenAI's image generation model that creates images through ChatGPT. At one point this was the best choice for image generation, but now it’s not as good as competitors.
Grok also offers image generation, but it’s not as good as that of Nano Banana 2. That said, Grok permits explicit content, so you can potentially create images that other models won’t let you make because of safety filtering.
Sora 2 and Kling o1
Sora 2 and Kling o1 are the best AI video models in 2025. Sora is OpenAI's video generation model that offers exceptional quality and realistic physics compared to competitors. It can also generate videos with sound.
Kling o1 is the world’s first unified multi-modal AI model, meaning you can throw any content and attachments at it and create ultra-complex prompts, giving you more control over the end-result than anything else on the market.
What else is worth considering? Veo 3.1 — this is Google's video generation model that works alongside Gemini. It is almost as good as Sora 2, but the videos aren’t quite as realistic.
Gemini 3 Pro
Gemini 3 Pro has a 1 million-token context window, which allows it to digest and reason about very long documents, large spreadsheets, CSV files, or databases.
It has another advantage —strong multimodal processing. This measn that the model can read images, scans, and visual content very accurately, making it ideal for analyzing and chatting with PDF documents.
Google workspace users will also find it convenient that Gemini 3 Pro integrates directly with Google Sheets, Google Analytics, and other Google Workspace tools
Why is Gemini 3 Pro so good at data analysis? It’s built different (no pun intended).
Unlike other models that process different media types sequentially, Gemini understands text, images, tables, and charts simultaneously within its architecture. This makes it particularly strong at analyzing documents that combine multiple data formats — like quarterly reports with embedded charts or research papers with tables and graphs.
Both flagship AI models offer free tiers and multiple paid options. Here's how the pricing structures compare across all four models:
ChatGPT offers the best value at the basic tier. Plus costs $20/month compared to SuperGrok's $30/month, but it has more features, like Canvas, Custom GPTs, and Projects.
Gemini Advanced is similar to ChatGPT Plus, costing $20 per month. It works with Google Workspace apps like Gmail, Docs, and Sheets. For people who already use Google a lot, this added feature is really useful.
For developers building applications, here's how the API costs compare per million tokens:
ChatGPT offers the best API rates for most use cases. Gemini's API pricing is slightly cheaper for smaller contexts but becomes more expensive for large contexts above 200,000 tokens.
One thing to note is that Gemini 3 Pro costs 12% more to run than Gemini 2.5 Pro. This is different from most new flagship models, which are usually cheaper to run than older versions.
In November 2025, four popular models were released in quick succession, with each one being named the best in the world for a short period. It seems like every week, a new AI model comes out that's better than the one before it.
The only problem with this is that it's expensive. Even the basic subscription to these four models costs at least $100 USD. This price is for all the features. Thankfully, there's a better option.
With a single subscription starting at $4.99 per week, you can access all four models on Overchat AI.
An AI model is a large language model trained on massive amounts of text data using transformer-based neural networks. These models learn patterns in language and can generate human-like text, analyze data, write code, and perform various other tasks.
This depends on what you want to do. For coding, Claude Opus 4.5 is currently the best, according to the benchmark. But Gemini 3 Pro is better for data analysis, while GPT-5.1 is better for writing.
Claude Opus 4.5 is the best AI model for coding. It scored 80.9% on SWE-bench Verified, beating Gemini 3 Pro (76.2%), GPT-5.1 (76.3%), and Grok 4.1 (74.9%) at real-world software engineering tasks.
GPT-5.1 is the best AI model for writing. It ranked #1 on the Creative Writing v3 benchmark and emphasizes a warmer, more natural tone compared to previous versions.
Gemini 3 Pro is the best AI model for math. It scored 95.0% on AIME 2025, edging out GPT-5.1 (94.6%) and Grok 4.1 (88%) on high school math competition problems.
Nano Banana 2 is the best AI image generation model. Many people say that its release was as big a breakthrough for image generation as the release of GPT-3 for text generation. This is because it makes it possible to do things that were simply not possible before, like merging 14 images into one, or creating detailed infographics with perfect text and accurate facts.
GPT-5.1 is the best OpenAI model. There are two versions: GPT-5.1 Instant is good for everyday tasks, and GPT-5.1 Thinking is good for complex problems that need more advanced thinking.
