Best Claude 4 Alternatives After Deprecation — June 2026 Guide
Claude 4 Opus and Sonnet 4 retire June 15, 2026. Here are the best alternatives — including the drop-in replacements, plus cross-provider options if you want to switch entirely.
June 15 deadline: After this date, API calls to claude-4-opus and claude-sonnet-4 will fail. You have 13 days to migrate.
Quick Answer: Just Upgrade to the Replacements
The easiest path is to upgrade to Anthropic's own replacements. Same API, same SDK, same quality — just change the model name string:
| Retiring | Replacement | Price Change | Context | Effort |
|---|---|---|---|---|
| Claude 4 Opus | Claude Opus 4.8 | 67% cheaper ($15→$5 in, $75→$25 out) | 200K → 1M | 1 line of code |
| Claude Sonnet 4 | Claude Sonnet 4.6 | Same price ($3/$15) | 200K → 1M | 1 line of code |
Use our free calculator to see exactly what you'll pay after migration based on your actual usage. Open the Claude Deprecation Calculator →
🚨 June 15 deadline: See all 34 alternatives, calculate your savings, and get migration code on our Claude 4 Deprecation Hub.
If You Want to Switch Providers Entirely
Maybe you want to reduce costs further, explore different capabilities, or diversify away from a single provider. Here are the best alternatives across all major providers:
Claude Opus 4.8 Recommended
Best choice if you're happy with Anthropic. 67% cheaper than Claude 4 Opus, 5x larger context window, same quality. Just change the model name string in your code.
GPT-5
92% cheaper on input than Claude 4 Opus. Great for code generation, tool use, and multi-modal tasks. API is similar to Anthropic's — migration takes under an hour for most teams.
Gemini 3.1 Pro
87% cheaper than Claude 4 Opus with the same 1M context. Excellent for document analysis, video understanding, and large codebase work. Native Google Cloud integration.
DeepSeek V4 Pro
97% cheaper than Claude 4 Opus. Surprisingly capable for the price. Strong at coding, math, and reasoning. OpenAI-compatible API makes migration straightforward.
GPT-5 mini
98% cheaper than Claude 4 Opus. Handles most production workloads well. Consider routing simple requests here and keeping premium models for complex reasoning.
Gemini 2.0 Flash
99% cheaper than Claude 4 Opus. Ideal for high-volume, low-complexity tasks like classification, summarization, and chatbot responses. 1M context is generous at this price.
Migration Effort by Provider
| From | To | Changes Needed | Time Estimate |
|---|---|---|---|
| Claude 4 Opus/Sonnet | Claude Opus 4.8/Sonnet 4.6 | Change model name string only | 5 minutes |
| Claude 4 | GPT-5 | API base URL, auth, model name, SDK | 30-60 minutes |
| Claude 4 | Gemini 3.1 Pro | API base URL, auth, model name, SDK | 30-60 minutes |
| Claude 4 | DeepSeek V4 Pro | API base URL, auth, model name (OpenAI-compatible) | 15-30 minutes |
Cost Comparison: Real Workload
For a workload of 10M input tokens + 2M output tokens per month (typical for a mid-size AI app):
| Model | Monthly Cost | Savings vs Claude 4 Opus |
|---|---|---|
| Claude 4 Opus (current) | $300.00 | — |
| Claude Opus 4.8 | $100.00 | $200.00 saved (67%) |
| GPT-5 | $32.50 | $267.50 saved (89%) |
| Gemini 3.1 Pro | $44.00 | $256.00 saved (85%) |
| DeepSeek V4 Pro | $6.09 | $293.91 saved (98%) |
| GPT-5 mini | $6.50 | $293.50 saved (98%) |
| Gemini 2.0 Flash | $1.80 | $298.20 saved (99%) |
Bottom line: Even the direct replacement (Opus 4.8) saves you $200/month. If you're open to switching providers, you can save 85-99%.
Step-by-Step Migration Guide
Step 1: Find all references to deprecated models
# Search your codebase
grep -r "claude-4-opus\|claude-sonnet-4" src/
grep -r "claude-4-opus\|claude-sonnet-4" config/Step 2: Update the model name
// Before (deprecated)
model: "claude-4-opus"
// After (replacement)
model: "claude-opus-4-8"Step 3: Test in parallel
Run both old and new models on the same prompts for 1-2 weeks. Compare output quality, latency, and cost. Only cut over once you're confident.
Step 4: Update and deploy
Once validated, update your production code and deploy. Your API key, SDK, and endpoint all stay the same — no new credentials needed.
Deadline: June 15 — 13 days left
Compare all 34 alternatives to Claude 4 with your exact usage. See costs ranked cheapest-first.
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