Claude Sonnet 4 vs Reka Flash
Performance benchmarks + pricing comparison — updated April 2026
Claude Sonnet 4
AnthropicAnthropic's balanced model for coding and general tasks. Best price-performance ratio in the Claude family.
| Input | $3.00/M |
| Output | $15.00/M |
| Context | 200K tokens |
| Best For | Day-to-day coding, code review, documentation |
| Benchmark | 78/100 |
Reka Flash
RekaReka's fast multimodal model. Compact and efficient for high-volume tasks with vision capability.
| Input | $0.200/M |
| Output | $0.800/M |
| Context | 128K tokens |
| Best For | High-volume tasks, vision + text, cost optimization |
| Benchmark | 40/100 |
Benchmark Performance Comparison
Third-party benchmark scores — higher is better. Data sourced from SWE-bench, LiveCodeBench, HumanEval, and BigCodeBench.
| Benchmark | Claude Sonnet 4 | Reka Flash | Leader |
|---|---|---|---|
| Overall Score | 78 | 40 | Claude Sonnet 4 leads by 38pts |
| SWE-bench Verified | 74 | 32 | Claude Sonnet 4 leads by 42pts |
| LiveCodeBench | 82 | 42 | Claude Sonnet 4 leads by 40pts |
| HumanEval | 92 | 62 | Claude Sonnet 4 leads by 30pts |
| BigCodeBench | 64 | 26 | Claude Sonnet 4 leads by 38pts |
Cost Comparison by Scenario
Estimated cost per project with 30% cache hit rate. Actual costs may vary based on usage patterns.
| Scenario | Claude Sonnet 4 | Reka Flash | Savings |
|---|---|---|---|
| Small Script (1K lines) | $0.62 | $0.03 | Reka Flash saves $0.58 (95%) |
| Medium Feature (10K lines) | $4.66 | $0.23 | Reka Flash saves $4.43 (95%) |
| Large Project (50K lines) | $23.29 | $1.15 | Reka Flash saves $22.14 (95%) |
| Code Review (5K lines) | $1.20 | $0.06 | Reka Flash saves $1.15 (95%) |
Value Analysis (Price per Benchmark Score Point)
Lower is better — how much you pay for each point of benchmark performance.
| Model | Overall Score | Price per Score Point | Verdict |
|---|---|---|---|
| Claude Sonnet 4 | 78 | $0.038/pt | Higher cost per point |
| Reka Flash | 40 | $0.025/pt | Better value |
Reka Flash delivers the best value at $0.025 per score point.
Strengths & Weaknesses
Claude Sonnet 4
- + Price-performance leader
- + Strong at web development
- + Excellent code review
- - Struggles with complex algorithms
- - Less consistent on system design
Reka Flash
- + Multimodal
- + Fast
- - Basic coding
- - Niche provider
Verdict
Reka Flash is cheaper at $0.200/M, but Claude Sonnet 4 scores higher on benchmarks (78 vs 40).
Choose Reka Flash for cost-sensitive projects, Claude Sonnet 4 when performance matters most.
Compare with Other Models
Claude Opus 4
AnthropicAnthropic's most powerful model. Best for complex reasoning and challenging coding tasks.
Claude 3.5 Sonnet
AnthropicPrevious generation Sonnet. Still excellent for coding tasks at the same price point.
Claude 3.5 Haiku
AnthropicFast, cost-effective model for high-volume tasks. Great for code review and simple queries.
Claude 3 Opus
AnthropicFirst generation Opus. Highest reasoning capability in the Claude 3 family.
Claude 3 Sonnet
AnthropicFirst generation Sonnet. Balanced performance for general tasks.
Claude 3 Haiku
AnthropicCheapest Claude model. Fast responses for simple tasks and basic coding.