> ## Documentation Index
> Fetch the complete documentation index at: https://pulze.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Model Deprecations

> Deprecated and upcoming deprecations for AI models

# Model Deprecations

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

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

## Migration Support

Need help migrating from deprecated models? Contact us at [support@pulze.ai](mailto: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

<AccordionGroup>
  <Accordion title="Claude 3.5 Sonnet (October 22, 2025)" icon="ban">
    **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.
  </Accordion>
</AccordionGroup>

### OpenAI

<AccordionGroup>
  <Accordion title="o1-preview" icon="ban">
    **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.
  </Accordion>

  <Accordion title="o1-mini" icon="ban">
    **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.
  </Accordion>
</AccordionGroup>

### Google

<AccordionGroup>
  <Accordion title="Gemini 1.5 Flash" icon="ban">
    **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.
  </Accordion>

  <Accordion title="Gemini 1.5 Pro" icon="ban">
    **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.
  </Accordion>

  <Accordion title="Gemini 1.5 Experimental" icon="ban">
    **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.
  </Accordion>
</AccordionGroup>

### Groq

<AccordionGroup>
  <Accordion title="DeepSeek R1 Distill" icon="ban">
    **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.
  </Accordion>

  <Accordion title="Llama 3 Models" icon="ban">
    **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.
  </Accordion>
</AccordionGroup>

### Fireworks

<AccordionGroup>
  <Accordion title="Llama 3.2" icon="ban">
    **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.
  </Accordion>

  <Accordion title="DeepSeek R1" icon="ban">
    **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.
  </Accordion>

  <Accordion title="Phi 3.5" icon="ban">
    **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.
  </Accordion>
</AccordionGroup>

### Cohere

<AccordionGroup>
  <Accordion title="Command R" icon="ban">
    **Deprecated**: Recently

    **Recommended Alternatives**:

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

    **Migration Notes**: Command A provides significant improvements in reasoning and performance.
  </Accordion>

  <Accordion title="Command R+" icon="ban">
    **Deprecated**: Recently

    **Recommended Alternatives**:

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

    **Migration Notes**: Command A represents the next generation with better capabilities.
  </Accordion>
</AccordionGroup>

### Together AI

<AccordionGroup>
  <Accordion title="Various Legacy Models" icon="ban">
    **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.
  </Accordion>
</AccordionGroup>

### Mistral

<AccordionGroup>
  <Accordion title="Large 2407" icon="ban">
    **Deprecated**: Recently

    **Recommended Alternatives**: Contact Pulze team for recommendations based on your specific use case.

    **Migration Notes**: Multiple strong alternatives available across providers.
  </Accordion>

  <Accordion title="Mixtral 8x22B" icon="ban">
    **Deprecated**: Recently

    **Recommended Alternatives**: Contact Pulze team for recommendations based on your specific use case.

    **Migration Notes**: Newer models offer better performance and capabilities.
  </Accordion>
</AccordionGroup>

## Upcoming Deprecations

These models will be deprecated on the specified dates:

<Warning>
  Plan migrations before these deprecation dates to avoid service disruption.
</Warning>

### Anthropic

<AccordionGroup>
  <Accordion title="Claude 3 Opus - January 5, 2026" icon="clock">
    **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
  </Accordion>
</AccordionGroup>

### Google

<AccordionGroup>
  <Accordion title="Gemini 2.0 Flash Models - February 5, 2026" icon="clock">
    **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
  </Accordion>
</AccordionGroup>

## 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](mailto: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:

<CardGroup cols={2}>
  <Card title="Contact Support" icon="headset" href="mailto:support@pulze.ai">
    Email [support@pulze.ai](mailto:support@pulze.ai) for migration assistance
  </Card>

  <Card title="Schedule Consultation" icon="calendar">
    Book time with our team to plan your migration
  </Card>

  <Card title="Model Catalog" icon="microchip" href="/models/overview">
    Explore all currently available models
  </Card>

  <Card title="Custom Routers" icon="route" href="/features/custom-routers">
    Update routing logic after migration
  </Card>
</CardGroup>