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Every score has a dated snapshot.

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  3. GPT-5.6 Sol vs Reka Flash 3

Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

GPT-5.6 Sol vs Reka Flash 3 benchmark

In this head-to-head showdown, Reka Flash 3 is more budget-friendly at $0.2/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Executive Comparison Verdict

Bottom Line: Choose GPT-5.6 Sol if your priority is peak reasoning, complex code generation, and top preference Elo. Choose Reka Flash 3 if you are optimizing for low latency, high throughput, and cost-efficient API deployment.
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Executive Verdict Summary

Reka Flash 3 holds empirical advantage (2 of 3 metrics)

Coding / SWESWE-bench
GPT-5.6 SolTop code solve rate
ReasoningGPQA / Live
GPT-5.6 SolTop logical accuracy
Best Value$/1M Tok
Reka Flash 3Lowest API billing cost
Speed / TokTok/Sec
GPT-5.6 SolFastest stream rate

Verified Advantage Breakdown

3 benchmarks evaluated across capability, speed, and cost

GPT-5.6 Sol (1)Reka Flash 3 (2)
GPT-5.6 Sol
1 of 3 Wins
✓Context window
Reka Flash 3
2 of 3 Wins
✓Input price✓Output price
OpenAI
Leads 1 of 3
GPT-5.6 Sol

OpenAI 5.6 flagship tier. Official API $5/$30 per 1M tokens (OpenAI pricing, Jul 30 2026 update left Sol unchanged).

Elo 1,608In: $5 · Out: $30/1M
rekaai
Leads 2 of 3
Reka Flash 3

Auto-discovered from OpenRouter (rekaai/reka-flash-3). Preview until a second source matches.

In: $0.1 · Out: $0.2/1M

GPT-5.6 Sol Thinking Depth & Cost Scaler

Model A

Simulate accuracy gains vs added response time & token cost

Mode: Medium (Standard)

Reasoning models “think before answering” by generating internal reasoning tokens. Higher effort improves math, coding, and logic accuracy, but increases response delay and token costs.

Delay
270 ms
Standard
CoT Tokens
~1,500
Internal reasoning
Cost / 1k
$56.50
4.9× base bill
Accuracy Boost
+4.5%
STEM & Logic
Top Rival Showdowns for GPT-5.6 Sol
All Matchups
Compare vs:vs Claude Opus 4.5vs Gemini 3 Provs Grok 4.6vs DeepSeek V4 Provs Qwen 3 Max
Preference Leader

No shared data

Single model data

Throughput Leader

No shared data

No latency data

Value per Dollar LeaderReka Flash 3 Wins

Reka Flash 3

$0.19999999999999998 / 1M output

Capability Percentiles

Relative percentile scores computed across all active models in the benchmark catalog.

Multi-Dimensional Capability Radar

Leaders Matchup Capability Radar

Comparing top standard models across 6 key capability dimensions. Tap any spoke or dot to inspect.

Tap any node to inspect
0–100 %ile

Overall Matchup Breakdown

Category wins across reasoning intelligence, generation speed, and token cost.

GPT-5.6 Sol (8)vsReka Flash 3 (2)
GPT-5.6 Sol: 8W (80%)Overall: GPT-5.6 SolReka Flash 3: 2W (20%)
← GPT-5.6 SolReka Flash 3 →
🏆GPT-5.6 Sol Leads(5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Benchmark
GPT-5.6 SolvsReka Flash 3
Preference Elo
1,608vs—
Coding Elo
1,602vs—
SWE-bench
77.6%vs—
LiveBench
73.9%vs—
GPQA Diamond
86.8%vs—
GPT-5.6 Sol: 5WReka Flash 3: 0W
🏆GPT-5.6 Sol Leads(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark
GPT-5.6 SolvsReka Flash 3
Output speed
84 tok/svs—
Time to first token
270 msvs—
GPT-5.6 Sol: 2WReka Flash 3: 0W
🏆Reka Flash 3 Leads(2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Benchmark
GPT-5.6 SolvsReka Flash 3
Output price
$30/1Mvs$0.2/1M+$29.8/1M
Input price
$5/1Mvs$0.1/1M+$4.9/1M
Context window
1.1Mvs66k+984k
GPT-5.6 Sol: 1WReka Flash 3: 2W

Side-by-Side Benchmark Matrix

GPT-5.6 SolReka Flash 3
Preference Elo
GPT-5.6 Sol1,608
Reka Flash 3—
Coding Elo
GPT-5.6 Sol1,602
Reka Flash 3—
LiveBench
GPT-5.6 Sol73.9%
Reka Flash 3—
SWE-bench
GPT-5.6 Sol77.6%
Reka Flash 3—
GPQA Diamond
GPT-5.6 Sol86.8%
Reka Flash 3—
Time to first token
GPT-5.6 Sol270 ms
Reka Flash 3—
Output speed
GPT-5.6 Sol84 tok/s
Reka Flash 3—
Input priceReka Flash 3 +$4.9/1M
GPT-5.6 Sol$5/1M
Reka Flash 3$0.1/1M
Output priceReka Flash 3 +$29.8/1M
GPT-5.6 Sol$30/1M
Reka Flash 3$0.2/1M
Context windowGPT-5.6 Sol +984k
GPT-5.6 Sol1.1M
Reka Flash 366k
BenchmarkGPT-5.6 SolReka Flash 3Advantage Delta
Preference Elo
1,608
lmarena · Aug 16, 2026
——
Coding Elo
1,602
lmarena · Aug 16, 2026
——
LiveBench
73.9%
livebench · Aug 16, 2026
——
SWE-bench
77.6%
swebench · Aug 16, 2026
——
GPQA Diamond
86.8%
seed-bootstrap · Aug 16, 2026
——
Time to first token
270 ms
seed-bootstrap · Aug 16, 2026
——
Output speed
84 tok/s
seed-bootstrap · Aug 16, 2026
——
Input price
$5/1M
openrouter · Aug 17, 2026
$0.1/1M
openrouter · Aug 17, 2026
+$4.9/1M
Output price
$30/1M
openrouter · Aug 17, 2026
$0.2/1M
openrouter · Aug 17, 2026
+$29.8/1M
Context window
1.1M
openrouter · Aug 17, 2026
66k
openrouter · Aug 17, 2026
+984k

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save 99% with Reka Flash 3
Monthly Volume50M tokens/mo
Quick Presets:
Token Ratio (In vs Out)70% In / 30% Out
RAG / Search (10% out)Coding / Chat (50% out)
GPT-5.6 Sol$625.00 / mo
In: $175Out: $450
Reka Flash 3$6.50 / mo
In: $3.5Out: $3
Estimated Cost Delta

Reka Flash 3 is estimated to save $618.50/month ($7,422/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

  • 1
    Reka Flash 3:Pick Reka Flash 3 when you are optimizing output cost.
  • 2
    GPT-5.6 Sol:Pick GPT-5.6 Sol for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatReka Flash 3

Lower output list price ($0.2/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGGPT-5.6 Sol

Larger window (1.1M).

Screenshots / visionGPT-5.6 Sol

GPT-5.6 Sol is the side marked multimodal in the catalog.

Target WorkloadRecommended PickEvaluation Rationale
Repo / coding agentsinsufficient dataNeed SWE-bench on both sides.
High-volume chatReka Flash 3Lower output list price ($0.2/1M).
Voice / low-latency UIinsufficient dataNeed TTFT on both sides.
Long-document RAGGPT-5.6 SolLarger window (1.1M).
Screenshots / visionGPT-5.6 SolGPT-5.6 Sol is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news
compareAug 12, 2026

Grok vs ChatGPT: price and Elo, not a personality contest

Brand hub remaps to top xAI vs top OpenAI. After Aug 12 that is Grok 4.6 vs Sol.

compareJul 24, 2026

Claude vs GPT benchmark: this hub always remaps to the current Elo leaders

Not a frozen 2025 article. Today that is usually Opus 5 vs GPT-5.6 Sol. Dated cells, not a brand fight.

compareJul 16, 2026

Gemini vs GPT: long context versus the OpenAI flagship invoice

Hub remaps to top Google vs top OpenAI Elo. Usually 3.6 Pro vs Sol. Window vs price is the plot.

launchJul 9, 2026

GPT-5.6 Sol: OpenAI’s $5/$30 flagship tier on this leaderboard

Jul 9 2026 family; Jul 30 price update left Sol unchanged. This is the GPT side of Claude vs GPT.

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK
VS
OpenAI

GPT-5.6 Sol

Elo 1,608
SWE-bench77.6%
Speed (tok/s)84 tok/s
Input / 1M Tokens$5/1M
Output / 1M Tokens$30/1M
rekaai

Reka Flash 3

Elo n/a
SWE-bench—
Speed (tok/s)66k
Input / 1M Tokens$0.1/1M
Output / 1M Tokens$0.2/1M

Frequently Asked Questions

Which is better overall, GPT-5.6 Sol or Reka Flash 3?
We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, GPT-5.6 Sol or Reka Flash 3?
SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?
Reka Flash 3 output tokens are $0.2/1M versus $30/1M. Input prices and retry rates still move the real bill.
Which is faster, GPT-5.6 Sol or Reka Flash 3?
We do not have TTFT for both models.
Which has the larger context window?
GPT-5.6 Sol accepts 1.1M tokens versus 66k.
Can I self-host either model?
Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?
No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?
Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. GPT-5.6 Sol and Reka Flash 3 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Related news

  • compare · Aug 12, 2026

    Grok vs ChatGPT: price and Elo, not a personality contest

  • compare · Jul 24, 2026

    Claude vs GPT benchmark: this hub always remaps to the current Elo leaders

  • compare · Jul 16, 2026

    Gemini vs GPT: long context versus the OpenAI flagship invoice

  • launch · Jul 9, 2026

    GPT-5.6 Sol: OpenAI’s $5/$30 flagship tier on this leaderboard

Similar Head-to-Head Comparisons

All GPT-5.6 Sol matchups →|All Reka Flash 3 matchups →
GPT-5.6 Sol vs GPT-5 (previous gpt-flagship)GPT-5.6 Terra vs GPT-5.6 SolGPT-4.5 Orion vs GPT-5.6 SolOpenAI: o3 Mini vs GPT-5.6 SolClaude Fable 5 vs GPT-5.6 SolClaude Opus 4.8 vs GPT-5.6 Sol