Best AI APIs After Claude 4 Shutdown — Every Alternative Ranked

Claude 4 is dead. You need a replacement today. This guide ranks every major AI API by price, quality, and use case — with real pricing data from each provider's API. No fluff, no sponsored picks. Just the numbers.

Quick Decision Tree — Pick Your Replacement in 30 Seconds

Complete Ranking — All AI APIs Compared

Every major AI API ranked by value (quality-per-dollar). Prices are per 1M tokens (input/output). Savings calculated vs Claude 4 Opus ($15/$75).

All prices from provider APIs as of June 15, 2026. Use our Cost Calculator to estimate your monthly spend with any of these models.

Best AI API by Use Case

Migration Code Snippets

Each provider has a different API format. Here's the minimum code change for each:

// Before (returns 410 Gone)
model: "claude-4-opus"

// After (official successor)
model: "claude-opus-4-8"

// Install: pip install openai
import openai

client = openai.OpenAI(
    api_key="your-deepseek-key",
    base_url="https://api.deepseek.com/v1"
)

response = client.chat.completions.create(
    model="deepseek-v4-pro",  # or deepseek-v4-flash
    messages=[{"role": "user", "content": "Hello"}]
)

// Install: pip install openai
import openai

client = openai.OpenAI(api_key="your-openai-key")

response = client.chat.completions.create(
    model="gpt-5",  # or gpt-5-mini, gpt-5.3-codex
    messages=[{"role": "user", "content": "Hello"}]
)

// Install: pip install google-genai
from google import genai

client = genai.Client(api_key="your-gemini-key")

response = client.models.generate_content(
    model="gemini-3.1-pro",  # or gemini-flash
    contents="Hello"
)

Monthly Cost Comparison

What you'd pay for 10M tokens/month (roughly 7M input + 3M output) across each provider:

Want to calculate your exact costs? Use our Cost Calculator — plug in your actual token usage and see what you'd pay with each provider.

What About Quality?

Price isn't everything. Here's how the top alternatives compare to Claude 4 Opus on key benchmarks:

• Claude Opus 4.8 — Matches or exceeds Claude 4 Opus on all benchmarks. Direct successor, same architecture improvements. Best if you want identical quality.
• DeepSeek V4 Pro — 95%+ of Claude 4 Opus quality on coding, math, and reasoning. Slightly weaker on creative writing. Best value for money.
• GPT-5.5 — Comparable to Claude 4 Opus on reasoning, stronger on some math tasks. Weaker on instruction following. Best for OpenAI ecosystem users.
• Gemini 3.1 Pro — Strong on multimodal tasks, 1M context window. Slightly weaker on pure text reasoning. Best for long documents and image analysis.

For most developers, DeepSeek V4 Pro offers the best quality-per-dollar. If you need absolute top quality and don't mind paying more, Claude Opus 4.8 is the safe choice.

FAQ — Choosing Your Next AI API