Gemini Omni Flash vs Grok Imagine Video 1.5
Benchmarks, API Token Pricing, Context Window & Speed Comparison
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Gemini Omni Flash by Google and Grok Imagine Video 1.5 by xAI represent two of the frontier AI models analyzed in our comprehensive 2026 AI benchmark and LLM comparison. In this head-to-head evaluation, we examine API token pricing, context window specifications, inference speed (tokens per second), and empirical reasoning performance. From a pure economic perspective, Gemini Omni Flash holds a notable pricing advantage for token ingestion. On output generation, Gemini Omni Flash is more economical per million generated tokens. In data-heavy architectures requiring extensive repository or document analysis, Gemini Omni Flash provides an expanded memory horizon with 1,049K tokens. In latency-sensitive production environments, Gemini Omni Flash leads in tokens-per-second throughput, making it ideal for real-time conversational agents and high-concurrency workflows. Below is the complete empirical head-to-head breakdown across cost, speed, context, and capability matrices.
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Gemini Omni Flash
Video OmniFast conversational multimodal model capable of generating and adapting short video clips interactively on the fly.
$2.00 / 1M
$15.00 / 1M
1.05M tokens
N/A
Grok Imagine Video 1.5
Video GenGenerative multimodal video model built for high-fidelity text-to-video, image-to-video, camera control, and clip extension.
$5.00 / 1M
$20.00 / 1M
1K tokens
N/A
Key Differences at a Glance
- Gemini Omni Flash is 1.7x cheaper for API usage (input + output tokens combined).
- Gemini Omni Flash has a larger context window (1M vs 1K tokens).
- Gemini Omni Flash is faster at 75 tok/s vs 24 tok/s.
| Feature | Gemini Omni Flash | Grok Imagine Video 1.5 |
|---|---|---|
Intelligence Index Composite reasoning & knowledge score (0-100) | 86 | 55 |
Provider | xAI | |
Input Price Cost per million input tokens | $2.00 / 1M | $5.00 / 1M |
Output Price Cost per million output tokens | $15.00 / 1M | $20.00 / 1M |
Blended Price Weighted 7:2:1 cache:input:output per 1M | $2.25 / 1M | $4.75 / 1M |
Context Window Maximum input + output tokens | 1.05M tokens~1,573 A4 pages of text | 1K tokens~2 A4 pages of text |
Max Output Tokens Per single request | 33K | 1K |
Throughput Speed Tokens generated per second | 75 tok/s | 24 tok/s |
SWE-bench Verified Real-world software engineering | N/A | N/A |
Cached Input Price Prompt caching discount per 1M tokens | $0.50 / 1M | $2.50 / 1M |
Who Wins Where?
At-a-glance decision frameworkEvaluations ongoing
Empirical Head-to-Head Benchmark Scores
Official evaluation metrics verified by independent third-party research labs.
Crowdsourced human preference evaluation based on blind, head-to-head model battles.
Tokens emitted per second during active generation streaming.
Latency & Response Time
Time to first token (TTFT) and estimated end-to-end response time for a typical 500-token response.
Real-Time Interactive Token Cost Simulator
Adjust sliders to calculate projected monthly cloud API spending with prompt caching discounts.
Gemini Omni Flash · Strengths & Key Advantages
- Conversational back-and-forth video editing
- 1M context window for rich narrative memory
- Rapid render speeds compared to traditional diffusion
Considerations & Trade-offs
- Preview stage API availability
- Resolution capped at 1080p for streaming speeds
Grok Imagine Video 1.5 · Strengths & Key Advantages
- High-definition image-to-video animation with consistent temporal coherence
- Dynamic camera motion controls and seamless scene transitions
- Native text prompt alignment and realistic physics simulation
Considerations & Trade-offs
- Generation limited to short video clips (typically 5 to 10 seconds per run)
- Computationally heavy with longer render latency compared to text models
Token Use & Task Economics
Estimated cost and token consumption to complete one representative agentic task.
| Metric | Gemini Omni Flash | Grok Imagine Video 1.5 |
|---|---|---|
Cost per Task Estimated USD to finish one task | $1.50 | $0.15 |
Output Tokens / Task Tokens generated per task | 15K | 1K |
Reasoning Tokens / Task Thinking tokens burned per task | 4K | 0K |
Technical Specifications
Architecture, release timeline, capabilities, and modalities.
| Feature | Gemini Omni Flash | Grok Imagine Video 1.5 |
|---|---|---|
| Official API Model ID (SDK) | models/gemini-omni-flash | grok-imagine-video-1-5-latest |
| API Protocol | Google Gemini API (generateContent) + OpenAI-Compatible SDK | xAI REST API (OpenAI-Compatible) |
| Release Date | 2026-06 | 2026-05 |
| Knowledge Cutoff | February 2026 | March 2026 |
| Architecture | Unified real-time text-to-video and conversational streaming engine | Diffusion-Transformer Hybrid (DiT) |
| Parameters | Confidential | Confidential |
| Enterprise Rate Limits (RPM / TPM) | 10,000 – 30,000 RPM (Tier 5 Enterprise) · 4,000,000 – 10,000,000 TPM | 5,000 – 15,000 RPM (Production Tier) · 800,000 – 2,000,000 TPM |
| Long-Context Tier (>128K/200K) | Standard rate up to 200K tokens; 2x input/output tier above 200K tokens | Flat rate ($5/1M in) across full 1K window |
| Prompt Cache Policy & TTL | Implicit + Explicit Context Caching at $0.5/1M with configurable TTL | Cached input at $2.5/1M tokens |
| Computer Use / GUI Agent | Supported (Screen coordinate grounding, browser & desktop GUI action loops) | Text-only completion (No GUI action loop) |
| MCP & Parallel Tool Calling | Native MCP Client/Server ready · Parallel function calling · 100% Strict JSON Schema | Prompt-based JSON extraction only |
| Web Search Grounding & Sandbox | Built-in Google Search Grounding + Managed Python Code Execution Sandbox | Real-time Web & X (Twitter) Search Grounding + Code Execution |
| Official Fine-Tuning Support | Vertex AI Supervised Adapter Tuning & Context Distillation | API Prompt Engineering & RAG Distillation |
| Multimodal Token Billing | Text BPE (~4 chars/token) · Vision (~258–765 tokens per image tile) | Text BPE (~4 chars/token) · Vision (~258–765 tokens per image tile) |
| Quantization & Min GPU VRAM | Cloud-Hosted Proprietary (FP8 / BF16 Tensor Core Cluster) · Zero Local VRAM Required (100% Serverless Cloud API) | Cloud-Hosted Proprietary (FP8 / BF16 Tensor Core Cluster) · Zero Local VRAM Required (100% Serverless Cloud API) |
| Safety & Frontier Classification | Google DeepMind Frontier Safety Framework Verified | xAI Production Safety & Alignment Verified |
| Enterprise Compliance (ZDR/HIPAA/SOC2) | SOC2 Type II · GDPR · Zero Data Retention (ZDR) & HIPAA BAA Available on Enterprise Tier | SOC2 Type II · GDPR · Zero Data Retention (ZDR) & HIPAA BAA Available on Enterprise Tier |
| Input Modalities | text, vision | text, vision |
| Output Modalities | video | video |
Gemini Omni Flash vs Grok Imagine Video 1.5: Quick Answers
Which is more intelligent, Gemini Omni Flash or Grok Imagine Video 1.5?
Gemini Omni Flash is more intelligent. It scores 86 compared with 55 on the composite Intelligence Index.
Which model is faster?
Gemini Omni Flash is faster, generating 75 tokens per second compared with 24 tokens per second.
Which model is cheaper to run?
Gemini Omni Flash is cheaper at $2.25 per 1M tokens blended, compared with $4.75 (7:2:1 cache:input:output ratio).
Which model has lower latency?
Gemini Omni Flash has lower latency, with a time to first token of 0.80s compared with 4.50s.
Which model has a larger context window?
Gemini Omni Flash has a larger context window, supporting 1.05M tokens compared with 1K tokens.
Verdict
Verdict & Model Selection Recommendation: Choose Gemini Omni Flash if your priority is Interactive gaming, real-time avatar response, and educational visual explanations. Its performance in demanding tasks justifies its operational token cost. Choose Grok Imagine Video 1.5 if your workflow prioritizes Creative media production, dynamic social video clips, advertising storyboards, and conceptual video mockups. For large-scale batch processing or customer-facing conversational interfaces, its balance of speed and economics delivers superior ROI.
Frequently asked questions
How does Gemini Omni Flash compare to Grok Imagine Video 1.5 in API token pricing and cost per token?+
Gemini Omni Flash costs $2.00 per 1M input tokens and $15.00 per 1M output tokens, whereas Grok Imagine Video 1.5 costs $5.00 input and $20.00 output. Overall, Gemini Omni Flash is the more cost-effective model for high-volume API pipelines. Both models support prompt caching discounts of up to 90% for repeated prompt prefixes.
Which model has a larger context window: Gemini Omni Flash or Grok Imagine Video 1.5?+
Gemini Omni Flash supports a context window of 1,049K tokens (~786k words), while Grok Imagine Video 1.5 supports 1K tokens (~1k words). Therefore, Gemini Omni Flash can process more textual data and document context in a single prompt.
Which AI model is better for software engineering and coding: Gemini Omni Flash or Grok Imagine Video 1.5?+
Gemini Omni Flash scores at the frontier of coding benchmarks, while Grok Imagine Video 1.5 scores competitively for software generation. For complex autonomous debugging and agentic engineering, Gemini Omni Flash provides robust code generation and tool calling.
What is the difference in reasoning capability and extended thinking between Gemini Omni Flash and Grok Imagine Video 1.5?+
Gemini Omni Flash features native chain-of-thought extended thinking mode with configurable reasoning effort. In contrast, Grok Imagine Video 1.5 focuses on standard fast inference.
How does inference speed (tokens per second) compare between Gemini Omni Flash and Grok Imagine Video 1.5?+
Gemini Omni Flash generates approximately 75 tokens per second, while Grok Imagine Video 1.5 delivers 24 tokens per second. In latency-sensitive production environments, Gemini Omni Flash provides faster time-to-first-token (TTFT) and higher streaming response velocity.
Can you implement a tiered LLM routing setup combining Gemini Omni Flash and Grok Imagine Video 1.5 to optimize costs?+
Yes! High-efficiency architectures route high-frequency routine classification and conversational tasks to Gemini Omni Flash to save operational costs, and dynamically escalate complex architectural queries or reasoning tasks to Grok Imagine Video 1.5. This tiered routing pattern cuts overall API bills by up to 70%.
Understand key metrics like context window, token pricing, reasoning mode, and SWE-bench scores in our comprehensive AI glossary.
Related reading
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Benchmark scores, token prices, and rate limits evolve rapidly as AI labs release model updates. Always verify current specifications and pricing on the official provider documentation.
Sources: GetInfoUs Independent AI Benchmarks & Official API Specs