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Looking for the right open source model? Whether you’re exploring by use case or migrating from closed source models like Claude, GPT, or Gemini, this guide provides recommendations based on Fireworks internal testing, customer deployments, and external benchmarks. We update it regularly as new models emerge.
Medium and small models typically offer faster responses and lower cost, with some tradeoff in capability for more complex tasks.

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Choose by Use Case

CategoryUse CaseRecommended Models
Code & DevelopmentCode generation, reasoning & agentic tasksDeepSeek V4 Pro, Kimi K2.6, GLM 5.1, MiniMax M2.7
AI ApplicationsAI agents with tool useKimi K2.6, DeepSeek V4 Pro, GLM 5.1, MiniMax M2.7
General reasoning & planningDeepSeek V4 Pro, Kimi K2.6, GLM 5.1, GPT-OSS 120B (medium)
Long context & summarizationDeepSeek V4 Pro, Kimi K2.6, Qwen3.6 Plus, GLM 5.1, DeepSeek V4 Flash
Fast extraction, classification & searchDeepSeek V4 Flash, MiniMax M2.5, Kimi K2.5, Step 3.7 Flash, GPT-OSS 20B (small)
Vision & MultimodalVision & document understandingKimi K2.6, Qwen3.6 Plus, Step 3.7 Flash, Gemma 4 31B (small)
Audio & video understandingQwen3 Omni 30B A3B Instruct, NVIDIA Nemotron 3 Nano Omni 30B A3B
Search & RetrievalEmbeddings & rerankingQwen3 Embedding 8B, Qwen3 Reranker 8B
For audio/video workloads, start with Qwen3 Omni 30B A3B Instruct. NVIDIA Nemotron 3 Nano Omni 30B A3B is a newer omni option, but its reasoning mode is currently limited to text+image inputs; use enable_thinking: false for video/audio requests.

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Migrating from Closed Models?

If you’re currently using Claude, OpenAI / GPT, or Gemini models, here’s a guide to the best open source alternatives on Fireworks by use case and latency requirements.

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Claude Alternatives

Closed SourceUse CaseLatency BudgetOpen Source Alternative
Claude Opus 4.8 / Sonnet 4.6• Agentic use cases
• Coding
• Research agents		High• DeepSeek V4 Pro
• Kimi K2.6
• GLM 5.1
• MiniMax M2.7
• Qwen3.6 Plus
Claude Haiku 4.5• Agentic use cases
• Coding
• Research agents		Low• Step 3.7 Flash
• DeepSeek V4 Flash
• MiniMax M2.5
• GPT-OSS 20B (small)

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OpenAI GPT Alternatives

Closed SourceUse CaseLatency BudgetOpen Source Alternative
GPT-5.5 / GPT-5.5 Pro• Agentic use cases
• Research agents		High• DeepSeek V4 Pro
• Kimi K2.6
• GLM 5.1
• MiniMax M2.7
GPT-5.4 mini & nano• Chatbots
• Intent classification
• Search		Low• Step 3.7 Flash
• DeepSeek V4 Flash
• MiniMax M2.5
• GPT-OSS 20B (small)

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Google Gemini Alternatives

Closed SourceUse CaseLatency BudgetOpen Source Alternative
Gemini 3.1 Pro• Agentic use cases
• Research agents
• Multimodal		High• DeepSeek V4 Pro
• Kimi K2.6
• GLM 5.1
• Qwen3.6 Plus
• MiniMax M2.7
Gemini 3.5 Flash & 3.1 Flash-Lite• Chatbots
• Intent classification
• Search		Low• Step 3.7 Flash
• DeepSeek V4 Flash
• MiniMax M2.5
• GPT-OSS 20B (small)
Understanding Latency Budget:
  • High latency budget: Quality is priority. Best for complex reasoning, multi-step workflows, and research tasks where accuracy matters more than speed.
  • Low latency budget: Speed is priority. Best for user-facing applications like chatbots, real-time search, and high-throughput classification.
You can explore and filter every available model in the Fireworks Model Library.
Last updated: June 2026