Model Deprecations

This page tracks deprecated models and upcoming deprecations. We recommend migrating to newer, more capable models listed in our recommendations.

Deprecated models are no longer available through Pulze. Please migrate to recommended alternatives to ensure continued service.

Migration Support

Need help migrating from deprecated models? Contact us at support@pulze.ai to:

• Discuss your use cases and requirements
• Identify optimal replacement models
• Test new models before full migration
• Plan smooth transitions for your team

Currently Deprecated Models

These models are no longer available:

Anthropic

Claude 3.5 Sonnet (October 22, 2025)

Deprecated: October 22, 2025 Recommended Alternatives:

• Claude Opus 4.1: Very capable model with highest intelligence
• Claude Sonnet 4.5: Best for complex agents and coding tasks
• Claude Sonnet 4.0: Updated with 1M token context window (up from 200K)

Migration Notes: Claude 4 series provides significant improvements in reasoning, coding, and long-context handling.

OpenAI

o1-preview

Deprecated: Recently Recommended Alternatives:

• GPT-5: Flagship model with 400K context window
• GPT-5 Mini: Cost-efficient with high reasoning capabilities
• o3-deep-research: For complex multi-step research tasks

Migration Notes: GPT-5 series offers superior performance with larger context windows and better reasoning.

o1-mini

Deprecated: Recently Recommended Alternatives:

• GPT-5 Mini: Cost-efficient with high reasoning capabilities
• GPT-5 Nano: Fastest, most affordable option

Migration Notes: GPT-5 Mini provides better performance at competitive pricing.

Google

Gemini 1.5 Flash

Deprecated: Recently Recommended Alternatives:

• Gemini 2.5 Flash: Best price/performance with thinking capabilities
• Gemini 2.5 Pro: Advanced reasoning with 1M+ context window

Migration Notes: Gemini 2.5 series provides significant improvements in reasoning and cost-efficiency.

Gemini 1.5 Pro

Deprecated: Recently Recommended Alternatives:

• Gemini 2.5 Pro: Advanced reasoning with 1M+ context window
• Gemini 2.5 Flash: Best price/performance with thinking capabilities

Migration Notes: Gemini 2.5 Pro offers better reasoning and longer context windows.

Gemini 1.5 Experimental

Deprecated: Recently Recommended Alternatives:

• Gemini 2.5 Pro: Advanced reasoning with 1M+ context window
• Gemini 2.5 Flash: Best price/performance with thinking capabilities

Migration Notes: Gemini 2.5 series represents the production-ready evolution of experimental features.

Groq

DeepSeek R1 Distill

Deprecated: Recently Recommended Alternatives:

• Groq Compound: Integrated tool orchestration
• OpenAI GPT-OSS 120B: Open-weight model with strong performance

Migration Notes: Groq Compound provides better tool integration capabilities.

Llama 3 Models

Deprecated: Recently Recommended Alternatives:

• Llama 4 Maverick: Meta’s latest multimodal flagship
• Llama 4 Scout: Balanced performance and efficiency
• OpenAI GPT-OSS Models: 20B & 120B variants

Migration Notes: Llama 4 series provides significant improvements over Llama 3.

Fireworks

Llama 3.2

Deprecated: Recently Recommended Alternatives:

• Llama 4 Models: Via Groq (Maverick & Scout)
• GPT-OSS Series: Via Fireworks
• DeepSeek V3.1 Variants: Via Fireworks

Migration Notes: Llama 4 provides better performance across all benchmarks.

DeepSeek R1

Deprecated: Recently Recommended Alternatives:

• DeepSeek V3.1 Variants: Available via Fireworks
• GPT-OSS Series: Available via Fireworks

Migration Notes: DeepSeek V3.1 offers improved reasoning and performance.

Phi 3.5

Deprecated: Recently Recommended Alternatives:

• GPT-5 Nano: For fast, affordable inference
• Gemini 2.5 Flash: Best price/performance

Migration Notes: GPT-5 Nano provides better performance at similar cost points.

Cohere

Command R

Deprecated: Recently Recommended Alternatives:

• Command A 03-2025: 256K context, 111B parameters

Migration Notes: Command A provides significant improvements in reasoning and performance.

Command R+

Deprecated: Recently Recommended Alternatives:

• Command A 03-2025: 256K context, 111B parameters

Migration Notes: Command A represents the next generation with better capabilities.

Together AI

Various Legacy Models

Deprecated: Recently Recommended Alternatives: Contact Pulze team for specific recommendations based on your use case. Migration Notes: We can help identify optimal replacements from our current model catalog.

Mistral

Large 2407

Deprecated: Recently Recommended Alternatives: Contact Pulze team for recommendations based on your specific use case. Migration Notes: Multiple strong alternatives available across providers.

Mixtral 8x22B

Deprecated: Recently Recommended Alternatives: Contact Pulze team for recommendations based on your specific use case. Migration Notes: Newer models offer better performance and capabilities.

Upcoming Deprecations

These models will be deprecated on the specified dates:

Plan migrations before these deprecation dates to avoid service disruption.

Anthropic

Claude 3 Opus - January 5, 2026

Deprecation Date: January 5, 2026 Recommended Alternatives:

• Claude Opus 4.1: Direct upgrade with significant improvements
• Claude Sonnet 4.5: Best for complex agents and coding tasks

Action Required: Begin testing Claude 4 series models and plan migration before January 5, 2026.

Migration Impact:

• Improved reasoning capabilities
• Better long-context handling
• Enhanced coding abilities
• More reliable tool use

Google

Gemini 2.0 Flash Models - February 5, 2026

Deprecation Date: February 5, 2026 Recommended Alternatives:

• Gemini 2.5 Flash: Direct upgrade with better price/performance
• Gemini 2.5 Pro: For more complex reasoning tasks

Action Required: Begin testing Gemini 2.5 series and plan migration before February 5, 2026.

Migration Impact:

• Improved thinking capabilities
• Better reasoning performance
• Enhanced multimodal understanding
• Competitive pricing

Recommended Models for Evaluation

When migrating or selecting new models, we recommend evaluating these current best-in-class options:

Top Performers by Category

Reasoning & General Intelligence

• xAI Grok 4 Fast: Currently leading all benchmarks as best model in the world (2M context)
• OpenAI GPT-5: Flagship model with 400K context window
• Anthropic Claude Opus 4.1: Very capable with highest intelligence

Coding & Agentic Tasks

• Anthropic Claude Sonnet 4.5: Best for complex agents and coding
• OpenAI GPT-5 Codex: Optimized for agentic coding environments
• xAI Grok Code Fast: Advanced for agentic coding tasks

Cost-Performance Leaders

• Google Gemini 2.5 Flash: Best price/performance with thinking capabilities
• OpenAI GPT-5 Nano: Fastest, most affordable option
• OpenAI GPT-5 Mini: Cost-efficient with high reasoning capabilities

Research & Analysis

• OpenAI o3-deep-research: Complex multi-step research tasks
• Google Gemini 2.5 Pro: Advanced reasoning with 1M+ context window

Specialized Use Cases

• AI21Labs Jamba Large 1.7: Novel Mamba-Transformer architecture, 256K context
• Groq Compound: Integrated tool orchestration (web search, code execution, browser automation)

Deprecation Policy

How We Handle Deprecations

1. Advance Notice: Minimum 90 days notice before deprecation
2. Migration Support: Technical guidance and testing assistance
3. Recommendations: Clear alternatives for each deprecated model
4. Gradual Transition: Staged rollout of replacements

Why Models Are Deprecated

Models may be deprecated due to:

• Provider Updates: Model provider releases significantly better versions
• Performance: Newer models substantially outperform on benchmarks
• Cost: Better price/performance alternatives become available
• Capabilities: New models offer features not in older versions
• Provider Sunset: Original provider discontinues the model

Staying Informed

• Email Notifications: We email all affected organizations before deprecations
• Documentation: This page is kept current with all deprecation information
• Support Channel: Contact support@pulze.ai with migration questions
• Slack/Discord: Join our community for real-time updates

Migration Best Practices

Before Migrating

1. Review Use Cases: Understand how you’re using the deprecated model
2. Evaluate Alternatives: Test recommended replacements with your workloads
3. Check Compatibility: Ensure new models support your required features
4. Plan Timeline: Allow sufficient time for testing and rollout

During Migration

1. Start with Test Spaces: Validate in non-production environments first
2. Run Evaluations: Compare new model performance against your datasets
3. Monitor Closely: Track quality, cost, and performance metrics
4. Gather Feedback: Get user input on new model performance

After Migration

1. Monitor Performance: Track ongoing quality and cost metrics
2. Adjust Routing: Update custom routers if applicable
3. Document Changes: Update internal documentation and playbooks
4. Share Learnings: Help your team understand any behavioral differences

Need Help?

Our team is here to support your migration:

Contact Support
Email support@pulze.ai for migration assistance.